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| PCF8563 Real-time clock/calendar 16 April 1999 Product specification 1. General description The PCF8563 is a CMOS real-time clock/calendar optimized for low power consumption. A programmable clock output, interrupt output and voltage-low detector are also provided. All address and data are transferred serially via a two-line bidirectional I2C-bus. Maximum bus speed is 400 kbits/s. The built-in word address register is incremented automatically after each written or read data byte. 2. Features s Provides year, month, day, weekday, hours, minutes and seconds based on 32.768 kHz quartz crystal s Century flag s Wide operating supply voltage range: 1.0 to 5.5 V s Low back-up current; typical 0.25 A at VDD = 3.0 V and Tamb = 25 C s 400 kHz two-wire I2C-bus interface (at VDD = 1.8 to 5.5 V) s Programmable clock output for peripheral devices: 32.768 kHz, 1024 Hz, 32 Hz and 1 Hz s Alarm and timer functions s Voltage-low detector s Integrated oscillator capacitor s Internal power-on reset s I2C-bus slave address: read A3H; write A2H s Open drain interrupt pin. 3. Applications s s s s Mobile telephones Portable instruments Fax machines Battery powered products. Philips Semiconductors PCF8563 Real-time clock/calendar 4. Quick reference data Table 1: Symbol VDD Quick reference data Parameter supply voltage operating mode Conditions I2C-bus I2C-bus inactive; Tamb = 25 C active; fSCL = 400 kHz; Tamb = -40 to +85 C IDD supply current; timer and CLKOUT disabled fSCL = 400 kHz fSCL = 100 kHz fSCL = 0 Hz; Tamb = 25 C VDD = 5 V VDD = 2 V Tamb Tstg operating ambient temperature storage temperature -40 -65 550 450 +85 +150 nA nA C C Min 1.0 1.8 Max 5.5 5.5 800 200 Unit V V A A 5. Ordering information Table 2: Ordering information Package Name PCF8563P PCF8563T PCF8563TS DIP8 SO8 TSSOP8 Description plastic dual in-line package; 8 leads (300 mil) plastic small outline package; 8 leads; body width 3.9 mm plastic thin shrink small outline package; 8 leads; body width 3.0 mm Version SOT97-1 SOT96-1 SOT505-1 Type number 6. Block diagram handbook, full pagewidth CLKOUT 7 OSCI OSCO INT VSS VDD 4 8 VOLTAGE DETECTOR OSCILLATOR MONITOR CONTROL LOGIC 1 2 3 OSCILLATOR 32.768 kHz DIVIDER 1 Hz CONTROL/STATUS 1 CONTROL/STATUS 2 SECONDS/VL MINUTES HOURS DAYS WEEKDAYS MONTHS/CENTURY YEARS MINUTE ALARM SCL SDA 6 5 I2C-BUS INTERFACE ADDRESS REGISTER HOUR ALARM DAY ALARM WEEKDAY ALARM CLKOUT CONTROL TIMER CONTROL TIMER POR 0 1 2 3 4 5 6 7 8 9 A B C D E F MGM662 Fig 1. Block diagram. 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 2 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar 7. Pinning information 7.1 Pinning handbook, halfpage OSCI 1 OSCO 2 8 VDD PCF8563P 7 CLKOUT PCF8563T INT 3 PCF8563TS 6 SCL 4 MGR885 VSS 5 SDA Fig 2. Pin configuration. handbook, halfpage OSCI 1 8 VDD OSCO 2 7 CLKOUT INT 3 6 SCL VSS 4 5 SDA PCF8563 MGR886 Fig 3. Device diode protection diagram. 7.2 Pin description Table 3: Symbol OSCI OSCO INT VSS SDA SCL CLKOUT VDD Pin description Pin 1 2 3 4 5 6 7 8 Description oscillator input oscillator output interrupt output (open-drain; active LOW) ground serial data I/O serial clock input clock output (open-drain) positive supply 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 3 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar 8. Functional description The PCF8563 contains sixteen 8-bit registers with an auto-incrementing address register, an on-chip 32.768 kHz oscillator with an integrated capacitor, a frequency divider which provides the source clock for the Real-Time Clock (RTC), a programmable clock output, a timer, an alarm, a voltage-low detector and a 400 kHz I2C-bus interface. All 16 registers are designed as addressable 8-bit parallel registers although not all bits are implemented. The first two registers (memory address 00H and 01H) are used as control and/or status registers. The memory addresses 02H through 08H are used as counters for the clock function (seconds up to year counters). Address locations 09H through 0CH contain alarm registers which define the conditions for an alarm. Address 0DH controls the CLKOUT output frequency. 0EH and 0FH are the timer control and timer registers, respectively. The Seconds, Minutes, Hours, Days, Months, Years as well as the Minute alarm, Hour alarm and Day alarm registers are all coded in BCD format. The Weekdays and Weekday alarm register are not coded in BCD format. When one of the RTC registers is read the contents of all counters are frozen. Therefore, faulty reading of the clock/calendar during a carry condition is prevented. 8.1 Alarm function modes By clearing the MSB (bit AE = Alarm Enable) of one or more of the alarm registers, the corresponding alarm condition(s) will be active. In this way an alarm can be generated from once per minute up to once per week. The alarm condition sets the alarm flag, AF (bit 3 of Control/Status 2 register). The asserted AF can be used to generate an interrupt (INT). Bit AF can only be cleared by software. 8.2 Timer The 8-bit countdown timer (address 0FH) is controlled by the Timer Control register (address 0EH; see Table 25). The Timer Control register selects one of 4 source clock frequencies for the timer (4096, 64, 1, or 160 Hz), and enables/disables the timer. The timer counts down from a software-loaded 8-bit binary value. At the end of every countdown, the timer sets the timer flag TF (see Table 7). The timer flag TF can only be cleared by software. The asserted timer flag TF can be used to generate an interrupt (INT). The interrupt may be generated as a pulsed signal every countdown period or as a permanently active signal which follows the condition of TF. TI/TP (see Table 7) is used to control this mode selection. When reading the timer, the current countdown value is returned. 8.3 CLKOUT output A programmable square wave is available at the CLKOUT pin. Operation is controlled by the CLKOUT frequency register (address 0DH; see Table 23). Frequencies of 32.768 kHz (default), 1024, 32 and 1 Hz can be generated for use as a system clock, microcontroller clock, input to a charge pump, or for calibration of the oscillator. CLKOUT is an open-drain output and enabled at power-on. If disabled it becomes high-impedance. 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 4 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar 8.4 Reset The PCF8563 includes an internal reset circuit which is active whenever the oscillator is stopped. In the reset state the I2C-bus logic is initialized and all registers, including the address pointer, are cleared with the exception of bits FE, VL, TD1, TD0, TESTC and AE which are set to logic 1. 8.5 Voltage-low detector and clock monitor The PCF8563 has an on-chip voltage-low detector. When VDD drops below Vlow the VL bit (Voltage Low, bit 7 in the Seconds register) is set to indicate that reliable clock/calendar information is no longer guaranteed. The VL flag can only be cleared by software. The VL bit is intended to detect the situation when VDD is decreasing slowly for example under battery operation. Should VDD reach Vlow before power is re-asserted then the VL bit will be set. This will indicate that the time may be corrupted. handbook, halfpage MGR887 VDD normal power operation period of battery operation Vlow t VL set Fig 4. Voltage-low detection. 8.6 Register organization Table 4: Registers overview Bit positions labelled as `-'are not implemented; those labelled with `0' should always be written with logic 0. Address Register name 00H 01H 0DH 0EH 0FH Control/Status 1 Control/Status 2 CLKOUT frequency Timer control Timer countdown value Bit 7 TEST1 0 FE TE Bit 6 0 0 - - Bit 5 STOP 0 - - Bit 4 0 TI/TP - - Bit 3 TESTC AF - - Bit 2 0 TF - - Bit 1 0 AIE FD1 TD1 Bit 0 0 TIE FD0 TD0 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 5 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar Table 5: BCD formatted registers overview Bit positions labelled as `-'are not implemented. Address Register name BCD format tens nibble Bit 7 23 02H 03H 04H 05H 06H 07H 08H 09H 0AH 0BH 0CH [1] BCD format units nibble Bit 4 20 Bit 3 23 Bit 2 22 Bit 1 21 Bit 0 20 21 Bit 6 22 Bit 5 Seconds Minutes Hours Days Weekdays Months/Century Years Minute alarm Hour alarm Day alarm Weekday alarm VL - - - - C AE AE AE AE - - - - - - - - - - Not coded in BCD. 8.6.1 Control/Status 1 register Table 6: Bit 7 5 Control/Status 1 register bits description (address 00H) Symbol Description TEST1 STOP TEST1 = 0; normal mode. TEST1 = 1; EXT_CLK test mode; see Section 8.7. STOP = 0; RTC source clock runs. STOP = 1; all RTC divider chain flip-flops are asynchronously set to logic 0; the RTC clock is stopped (CLKOUT at 32.768 kHz is still available). TESTC = 0; power-on reset override facility is disabled (set to logic 0 for normal operation). TESTC = 1; power-on reset override is enabled. By default set to logic 0. 3 TESTC 6, 4, 2 to 0 0 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 6 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar 8.6.2 Control/Status 2 register Table 7: Bit 7 to 5 4 Description of Control/Status 2 register bits description (address 01H) Symbol Description 0 TI/TP By default set to logic 0. TI/TP = 0: INT is active when TF is active (subject to the status of TIE). TI/TP = 1: INT pulses active according to Table 8 (subject to the status of TIE). Note that if AF and AIE are active then INT will be permanently active. 3 2 AF TF When an alarm occurs, AF is set to logic 1. Similarly, at the end of a timer countdown, TF is set to logic 1. These bits maintain their value until overwritten by software. If both timer and alarm interrupts are required in the application, the source of the interrupt can be determined by reading these bits. To prevent one flag being overwritten while clearing another, a logic AND is performed during a write access. See Table 9 for the value descriptions of bits AF and TF. Bits AIE and TIE activate or deactivate the generation of an interrupt when AF or TF is asserted, respectively. The interrupt is the logical OR of these two conditions when both AIE and TIE are set. AIE = 0: alarm interrupt disabled; AIE = 1: alarm interrupt enabled. TIE = 0: timer interrupt disabled; TIE = 1: timer interrupt enabled. Table 8: INT operation (bit TI/TP = 1) INT [1] period (s) n [2] = 1 4 096 64 1 1 60 1 8192 1 128 1 1 64 64 1 0 AIE TIE Source clock (Hz) n>1 1 4096 1 1 1 64 64 64 [1] [2] TF and INT become active simultaneously. n = loaded countdown timer value. Timer stopped when n = 0. Table 9: R/W Read Write Value descriptions for bits AF and TF Bit: TF Value Description 0 1 0 1 timer flag inactive timer flag active timer flag is cleared timer flag remains unchanged alarm flag inactive alarm flag active alarm flag is cleared alarm flag remains unchanged Bit: AF Value Description 0 1 0 1 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 7 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar 8.6.3 Seconds, Minutes and Hours registers Table 10: Seconds/VL register bits description (address 02H) Bit 7 Symbol VL Description VL = 0: reliable clock/calendar information is guaranteed; VL = 1: reliable clock/calendar information is no longer guaranteed. These bits represent the current seconds value coded in BCD format; value = 00 to 59. Example: 6 to 0 Table 12: Hours register bits description (address 04H) Bit 7 to 6 5 to 0 Symbol - 8.6.4 Days, Weekdays, Months/Century and Years registers Table 13: Days register bits description (address 05H) Bit 7 to 6 5 to 0 Symbol - 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 8 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar Table 15: Weekday assignments Day Sunday Monday Tuesday Wednesday Thursday Friday Saturday Bit 2 0 0 0 0 1 1 1 Bit 1 0 0 1 1 0 0 1 Bit 0 0 1 0 1 0 1 0 Table 16: Months/Century register bits description (address 07H) Bit 7 Symbol C Description Century bit. C = 0; indicates the century is 20xx. C = 1; indicates the century is 19xx. `xx' indicates the value held in the Years register; see Table 18. This bit is toggled when the Years register overflows from 99 to 00. These bits may be re-assigned by the user. 6 to 5 4 to 0 - not implemented Table 17: Month assignments Month January February March April May June July August September October November December Bit 4 0 0 0 0 0 0 0 0 0 1 1 1 Bit 3 0 0 0 0 0 0 0 1 1 0 0 0 Bit 2 0 0 0 1 1 1 1 0 0 0 0 0 Bit 1 0 1 1 0 0 1 1 0 0 0 0 1 Bit 0 1 0 1 0 1 0 1 0 1 0 1 0 Table 18: Years register bits description (address 08H) Bit 7 to 0 Symbol 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 9 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar 8.6.5 Alarm registers When one or more of the alarm registers are loaded with a valid minute, hour, day or weekday and its corresponding AE (Alarm Enable) bit is a logic 0, then that information will be compared with the current minute, hour, day and weekday. When all enabled comparisons first match, the bit AF (Alarm Flag) is set. AF will remain set until cleared by software. Once AF has been cleared it will only be set again when the time increments to match the alarm condition once more. Alarm registers which have their AE bit set at logic 1 will be ignored. Table 19: Minute alarm register bits description (address 09H) Bit 7 Symbol AE Description AE = 0; minute alarm is enabled. AE = 1; minute alarm is disabled. 6 to 0 6 to 0 Table 21: Day alarm register bits description (address 0BH) Bit 7 Symbol AE Description AE = 0; day alarm is enabled. AE = 1; day alarm is disabled. These bits represents the day alarm information coded in BCD format; value = 01 to 31. 6 to 0 Table 22: Weekday alarm register bits description (address 0CH) Bit 7 Symbol AE Description AE = 0; weekday alarm is enabled. AE = 1; weekday alarm is disabled. These bits represents the weekday alarm information value 0 to 6. 6 to 0 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 10 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar 8.6.6 CLKOUT frequency register Table 23: CLKOUT frequency register bits description (address 0DH) Bit 7 6 to 2 1 0 Symbol FE - FD1 FD0 Description FE = 0; the CLKOUT output is inhibited and the CLKOUT output is set to high-impedance. FE = 1; the CLKOUT output is activated. not implemented These bits control the frequency output (fCLKOUT) on the CLKOUT pin; see Table 24. Table 24: CLKOUT frequency selection FD1 0 0 1 1 FD0 0 1 0 1 fCLKOUT 32.768 kHz 1 024 Hz 32 Hz 1 Hz 8.6.7 Countdown timer registers The Timer register is an 8-bit binary countdown timer. It is enabled and disabled via the Timer control register bit TE. The source clock for the timer is also selected by the Timer control register. Other timer properties, e.g. interrupt generation, are controlled via the Control/status 2 register. For accurate read back of the countdown value, the I2C-bus clock SCL must be operating at a frequency of at least twice the selected timer clock. Table 25: Timer control register bits description (address 0EH) Bit 7 6 to 2 1 0 Symbol TE - TD1 TD0 Description TE = 0; timer is disabled. TE = 1; timer is enabled. not implemented Timer source clock frequency selection bits. These bits determine the source clock for the countdown timer, see Table 26. When not in use, TD1 and TD0 should be set to `11' (160 Hz) for power saving. Table 26: Timer source clock frequency selection TD1 0 0 1 1 TD0 0 1 0 1 Timer source clock frequency (Hz) 4096 64 1 1 60 Table 27: Timer countdown value register bits description (address 0FH) Bit 7 to 0 Symbol Description n Countdown period = --------------------------------------------------------Source clock frequency 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 11 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar 8.7 EXT_CLK test mode A test mode is available which allows for on-board testing. In this mode it is possible to set up test conditions and control the operation of the RTC. The test mode is entered by setting bit TEST1 in the Control/Status1 register. The CLKOUT pin then becomes an input. The test mode replaces the internal 64 Hz signal with the signal that is applied to the CLKOUT pin. Every 64 positive edges applied to CLKOUT will then generate an increment of one second. The signal applied to the CLKOUT pin should have a minimum pulse width of 300 ns and a minimum period of 1000 ns. The internal 64 Hz clock, now sourced from CLKOUT, is divided down to 1 Hz by a 26 divide chain called a pre-scaler. The pre-scaler can be set into a known state by using the STOP bit. When the STOP bit is set, the pre-scaler is reset to 0. STOP must be cleared before the pre-scaler can operate again. From a STOP condition, the first 1 s increment will take place after 32 positive edges on CLKOUT. Thereafter, every 64 positive edges will cause a 1 s increment. Remark: Entry into EXT_CLK test mode is not synchronized to the internal 64 Hz clock. When entering the test mode, no assumption as to the state of the pre-scaler can be made. 8.7.1 Operation example 1. Enter the EXT_CLK test mode; set bit 7 of Control/Status 1 register (TEST = 1) 2. Set bit 5 of Control/Status 1 register (STOP = 1) 3. Clear bit 5 of Control/Status 1 register (STOP = 0) 4. Set time registers (Seconds, Minutes, Hours, Days, Weekdays, Months/Century and Years) to desired value 5. Apply 32 clock pulses to CLKOUT 6. Read time registers to see the first change 7. Apply 64 clock pulses to CLKOUT 8. Read time registers to see the second change. Repeat steps 7 and 8 for additional increments. 8.8 Power-On Reset (POR) override mode The POR duration is directly related to the crystal oscillator start-up time. Due to the long start-up times experienced by these types of circuits, a mechanism has been built in to disable the POR and hence speed up on-board test of the device. The setting of this mode requires that the I2C-bus pins, SDA and SCL, be toggled in a specific order as shown in Figure 5. All timing values are required minimum. Once the override mode has been entered, the chip immediately stops being reset and normal operation starts i.e. entry into the EXT_CLK test mode via I2C-bus access. The override mode is cleared by writing a logic 0 to bit TESTC. Re-entry into the override mode is only possible after TESTC is set to logic 1. Setting TESTC to logic 0 during normal operation has no effect except to prevent entry into the POR override mode. 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 12 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar handbook, full pagewidth 500 ns 2000 ns SDA SCL 8 ms power up override active MGM664 Fig 5. POR override sequence. 8.9 Serial interface The serial interface of the PCF8563 is the I2C-bus. A detailed description of the I2C-bus specification, including applications, is given in the brochure: The I2C-bus and how to use it, order no. 9398 393 40011 or I2C Peripherals Data Handbook IC12. 8.9.1 Characteristics of the I2C-bus The I2C-bus is for bidirectional, two-line communication between different ICs or modules. The two lines are a serial data line (SDA) and a serial clock line (SCL). Both lines must be connected to a positive supply via a pull-up resistor. Data transfer may be initiated only when the bus is not busy. The I2C-bus system configuration is shown in Figure 6. A device generating a message is a `transmitter', a device receiving a message is the `receiver'. The device that controls the message is the `master' and the devices which are controlled by the master are the `slaves'. SDA SCL MASTER TRANSMITTER / RECEIVER SLAVE TRANSMITTER / RECEIVER MASTER TRANSMITTER / RECEIVER MBA605 SLAVE RECEIVER MASTER TRANSMITTER Fig 6. I2C-bus system configuration. 8.9.2 START and STOP conditions Both data and clock lines remain HIGH when the bus is not busy. A HIGH-to-LOW transition of the data line, while the clock is HIGH is defined as the start condition (S). A LOW-to-HIGH transition of the data line while the clock is HIGH is defined as the stop condition (P); see Figure 7. width SDA SDA SCL S START condition P STOP condition SCL MBC622 Fig 7. START and STOP conditions on the I2C-bus. 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 13 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar 8.9.3 Bit transfer One data bit is transferred during each clock pulse. The data on the SDA line must remain stable during the HIGH period of the clock pulse as changes in the data line at this time will be interpreted as a control signal; see Figure 8. dth SDA SCL data line stable; data valid change of data allowed MBC621 Fig 8. Bit transfer on the I2C-bus. 8.9.4 Acknowledge The number of data bytes transferred between the START and STOP conditions from transmitter to receiver is unlimited. Each byte of eight bits is followed by an acknowledge bit. The acknowledge bit is a HIGH level signal put on the bus by the transmitter during which time the master generates an extra acknowledge related clock pulse. A slave receiver which is addressed must generate an acknowledge after the reception of each byte. Also a master receiver must generate an acknowledge after the reception of each byte that has been clocked out of the slave transmitter. The device that acknowledges must pull down the SDA line during the acknowledge clock pulse, so that the SDA line is stable LOW during the HIGH period of the acknowledge related clock pulse (set-up and hold times must be taken into consideration). A master receiver must signal an end of data to the transmitter by not generating an acknowledge on the last byte that has been clocked out of the slave. In this event the transmitter must leave the data line HIGH to enable the master to generate a STOP condition. width DATA OUTPUT BY TRANSMITTER not acknowledge DATA OUTPUT BY RECEIVER acknowledge SCL FROM MASTER S START condition clock pulse for acknowledgement MBC602 1 2 8 9 Fig 9. Acknowledge on the I2C-bus. 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 14 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar 8.9.5 I2C-bus protocol Addressing: Before any data is transmitted on the I2C-bus, the device which should respond is addressed first. The addressing is always carried out with the first byte transmitted after the start procedure. The PCF8563 acts as a slave receiver or slave transmitter. Therefore the clock signal SCL is only an input signal, but the data signal SDA is a bidirectional line. The PCF8563 slave address is shown in Figure 10. handbook, halfpage 1 0 1 0 0 0 A0 R/W group 1 group 2 MRB016 Fig 10. Slave address. Clock/calendar read/write cycles: The I2C-bus configuration for the different PCF8563 read and write cycles are shown in Figure 11, 12 and 13. The word address is a four bit value that defines which register is to be accessed next. The upper four bits of the word address are not used. width acknowledgement from slave acknowledgement from slave acknowledgement from slave S SLAVE ADDRESS 0A WORD ADDRESS A DATA A P R/W n bytes auto increment memory word address MBD822 Fig 11. Master transmits to slave receiver (write mode). 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 15 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar handbook, full pagewidth acknowledgement from slave acknowledgement from slave acknowledgement from slave acknowledgement from master S SLAVE ADDRESS 0A WORD ADDRESS A S SLAVE ADDRESS 1A DATA A R/W at this moment master-transmitter becomes master receiver and PCF8563 slave-receiver becomes slave-transmitter R/W n bytes auto increment memory word address no acknowledgement from master DATA 1 P last byte MGL409 auto increment memory word address Fig 12. Master reads after setting word address (write word address; read data). handbook, full pagewidth acknowledgement from slave acknowledgement from master no acknowledgement from master S SLAVE ADDRESS 1A DATA A DATA 1 P R/W n bytes auto increment word address last byte auto increment word address MGL665 Fig 13. Master reads slave immediately after first byte (read mode). 9. Limiting values Table 28: Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol VDD IDD VI VO II IO Ptot Tamb Tstg 9397 750 04855 Parameter supply voltage supply current input voltage on inputs SCL and SDA input voltage on input OSCI output voltage on outputs CLKOUT and INT DC input current at any input DC output current at any output total power dissipation operating ambient temperature storage temperature Conditions Min -0.5 -50 -0.5 -0.5 -0.5 -10 -10 - -40 -65 Max +6.5 +50 6.5 VDD + 0.5 6.5 +10 +10 300 +85 +150 Unit V mA V V V mA mA mW C C (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 16 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar 10. Static characteristics Table 29: Static characteristics VDD = 1.8 to 5.5 V; VSS = 0 V; Tamb = -40 to 85 C; fOSC = 32.768 kHz; quartz Rs = 40 k; CL = 8 pF; unless otherwise specified. Symbol Supplies VDD supply voltage supply voltage for reliable clock/calendar information IDD1 supply current; CLKOUT disabled (FE = 0) I2C-bus inactive; Tamb = 25 C I2C-bus active; fSCL = 400 kHz Tamb = 25 C fSCL = 400 kHz fSCL = 100 kHz fSCL = 0 Hz; Tamb = 25 C VDD = 5 V VDD = 3 V VDD = 2 V fSCL = 0 Hz VDD = 5 V VDD = 3 V VDD = 2 V IDD2 supply current; CLKOUT enabled (fCLKOUT = 32 kHz; FE = 1) fSCL = 0 Hz; Tamb = 25 C VDD = 5 V VDD = 3 V VDD = 2 V fSCL = 0 Hz VDD = 5 V VDD = 3 V VDD = 2 V Inputs VIL VIH ILI Ci Outputs IOL(SDA) IOL(INT) LOW-level output current; pin SDA LOW-level output current; pin INT VOL = 0.4 V; VDD = 5 V -3 -1 -1 - - - - - - mA mA mA LOW-level input voltage HIGH-level input voltage input leakage current input capacitance VI = VDD or VSS [3] [2] [2] [2] [2] [2] Parameter Conditions Min 1.0 [1] 1.8 [1] Vlow - - - - - - - - - - - - - - VSS 0.7VDD -1 - Typ - - - - - 275 250 225 500 400 400 825 550 425 950 650 500 - - - - Max 5.5 5.5 5.5 800 200 550 500 450 750 650 600 1600 1000 800 1700 1100 900 0.3VDD VDD +1 7 Unit V V V A A nA nA nA nA nA nA nA nA nA nA nA nA V V A pF IOL(CLKOUT) LOW-level output current; pin CLKOUT 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 17 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar Table 29: Static characteristics...continued VDD = 1.8 to 5.5 V; VSS = 0 V; Tamb = -40 to 85 C; fOSC = 32.768 kHz; quartz Rs = 40 k; CL = 8 pF; unless otherwise specified. Symbol Parameter Conditions VOH = 4.6 V; VDD = 5 V VO = VDD or VSS Tamb = 25 C Min 1 -1 - Typ - - 0.9 Max - +1 1.0 Unit mA A V IOH(CLKOUT) HIGH-level output current; pin CLKOUT ILO Vlow [1] [2] [3] output leakage current voltage-low detection level Voltage detector For reliable oscillator start-up at power-up: VDD(min)power-up = VDD(min) + 0.3 V. Timer source clock = 160 Hz; SCL and SDA = VDD. Tested on sample basis. handbook, halfpage 1 MGR888 IDD (A) handbook, halfpage 1 MGR889 IDD (A) 0.8 0.8 0.6 0.6 0.4 0.4 0.2 0.2 0 0 2 4 VDD (V) 6 0 0 2 4 VDD (V) 6 Tamb = 25 C; Timer = 1 minute. Tamb = 25 C; Timer = 1 minute. Fig 14. IDD as a function of VDD; CLKOUT disabled. 1 MGR890 Fig 15. IDD as a function of VDD; CLKOUT = 32 kHz. MGR891 handbook, halfpage IDD (A) handbook, halfpage 4 frequency deviation (ppm) 2 0.8 0.6 0 0.4 -2 0.2 -4 0 -40 0 40 80 T (C) 120 0 2 4 6 VDD (V) VDD = 3 V; Timer = 1 minute. Tamb = 25 C; normalized to VDD = 3 V. Fig 16. IDD as a function of Tamb; CLKOUT = 32 kHz. 9397 750 04855 Fig 17. Frequency deviation as function of VDD. (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 18 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar 11. Dynamic characteristics Table 30: Dynamic characteristics VDD = 1.8 to 5.5 V; VSS = 0 V; Tamb = -40 to +85 C; fOSC = 32.768 kHz; quartz Rs = 40 k; CL = 8 pF; unless otherwise specified. Symbol Oscillator CL(integrated) integrated load capacitance fOSC/fOSC Rs CL CT CLKOUT I2C-bus fSCL tHD;STA tSU;STA tLOW tHIGH tr tf Cb tSU;DAT tHD;DAT tSU;STO tSW [1] [2] [3] Parameter Conditions Min 15 Typ 25 2 x 10-7 - 10 - 50 - - - - - - - - - - - - Max 35 - 40 - 25 - 400 - - - - 0.3 0.3 400 - - - 50 Unit pF oscillator stability series resistance parallel load capacitance trimmer capacitance CLKOUT duty factor VDD = 200 mV; Tamb = 25 C - - - 5 [1] Quartz crystal parameters (fOSC = 32.768 kHz) k pF pF % kHz s s s s s s pF ns ns s ns CLKOUT output - - 0.6 0.6 1.3 0.6 - - - 100 0 4.0 - timing characteristics [2] [3] SCL clock frequency START condition hold time set-up time for a repeated START condition SCL LOW time SCL HIGH time SCL and SDA rise time SCL and SDA fall time capacitive bus line load data set-up time data hold time set-up time for STOP condition tolerable spike width on bus Unspecified for fCLKOUT = 32.768 kHz. All timing values are valid within the operating supply voltage range at Tamb and referenced to VIL and VIH with an input voltage swing of VSS to VDD. I2C-bus access time between two STARTs or between a START and a STOP condition to this device must be less than one second. 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 19 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar ook, full pagewidth SDA t BUF t LOW tf SCL t HD;STA tr t HD;DAT t HIGH t SU;DAT SDA t SU;STA MGA728 t SU;STO Fig 18. I2C-bus timing waveforms. 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 20 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar 12. Application information handbook, full pagewidth VDD SDA MASTER TRANSMITTER/ RECEIVER 1F SCL VDD CLOCK CALENDAR OSCI OSCO SCL PCF8563 SDA VSS VDD R R R= R: pull-up resistor tr Cb SDA SCL (I2C-bus) MGM665 Fig 19. Application diagram. 12.1 Quartz crystal frequency adjustment Method 1: Fixed OSCI capacitor -- By evaluating the average capacitance necessary for the application layout a fixed capacitor can be used. The frequency is best measured via the 32.768 kHz signal available after power-on at the CLKOUT pin. The frequency tolerance depends on the quartz crystal tolerance, the capacitor tolerance and the device-to-device tolerance (on average 5 x 10-6). Average deviations of 5 minutes per year can be easily achieved. Method 2: OSCI trimmer -- The oscillator is tuned to the required accuracy by adjusting a trimmer capacitor on pin OSCI and measuring the 32.768 kHz signal available after power-on at the CLKOUT pin. Method 3: OSCO output -- Direct output measurement on pin OSCO (accounting for test probe capacitance). 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 21 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar 13. Package outline SO8: plastic small outline package; 8 leads; body width 3.9 mm SOT96-1 D E A X c y HE vMA Z 8 5 Q A2 A1 pin 1 index Lp 1 e bp 4 wM L detail X (A 3) A 0 2.5 scale 5 mm DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT mm inches A max. 1.75 A1 0.25 0.10 A2 1.45 1.25 A3 0.25 0.01 bp 0.49 0.36 c 0.25 0.19 D (1) 5.0 4.8 0.20 0.19 E (2) 4.0 3.8 0.16 0.15 e 1.27 HE 6.2 5.8 L 1.05 Lp 1.0 0.4 Q 0.7 0.6 v 0.25 0.01 w 0.25 0.01 y 0.1 Z (1) 0.7 0.3 0.010 0.057 0.069 0.004 0.049 0.019 0.0100 0.014 0.0075 0.244 0.039 0.028 0.050 0.041 0.228 0.016 0.024 0.028 0.004 0.012 8 0o o Notes 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. 2. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT96-1 REFERENCES IEC 076E03S JEDEC MS-012AA EIAJ EUROPEAN PROJECTION ISSUE DATE 95-02-04 97-05-22 Fig 20. SOT96-1. 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 22 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar DIP8: plastic dual in-line package; 8 leads (300 mil) SOT97-1 D seating plane ME A2 A L A1 c Z e b1 wM (e 1) b2 5 MH b 8 pin 1 index E 1 4 0 5 scale 10 mm DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT mm inches A max. 4.2 0.17 A1 min. 0.51 0.020 A2 max. 3.2 0.13 b 1.73 1.14 0.068 0.045 b1 0.53 0.38 0.021 0.015 b2 1.07 0.89 0.042 0.035 c 0.36 0.23 0.014 0.009 D (1) 9.8 9.2 0.39 0.36 E (1) 6.48 6.20 0.26 0.24 e 2.54 0.10 e1 7.62 0.30 L 3.60 3.05 0.14 0.12 ME 8.25 7.80 0.32 0.31 MH 10.0 8.3 0.39 0.33 w 0.254 0.01 Z (1) max. 1.15 0.045 Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT97-1 REFERENCES IEC 050G01 JEDEC MO-001AN EIAJ EUROPEAN PROJECTION ISSUE DATE 92-11-17 95-02-04 Fig 21. SOT97-1. 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 23 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar TSSOP8: plastic thin shrink small outline package; 8 leads; body width 3 mm SOT505-1 D E A X c y HE vMA Z 8 5 A2 pin 1 index A1 (A3) A Lp L 1 e bp 4 detail X wM 0 2.5 scale 5 mm DIMENSIONS (mm are the original dimensions) UNIT mm Notes 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. 2. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT505-1 REFERENCES IEC JEDEC EIAJ EUROPEAN PROJECTION ISSUE DATE 99-04-09 A max. 1.10 A1 0.15 0.05 A2 0.95 0.80 A3 0.25 bp 0.45 0.25 c 0.28 0.15 D(1) 3.10 2.90 E(2) 3.10 2.90 e 0.65 HE 5.10 4.70 L 0.94 Lp 0.70 0.40 v 0.1 w 0.1 y 0.1 Z(1) 0.70 0.35 6 0 Fig 22. SOT505-1. 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 24 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar 14. Soldering 14.1 Introduction This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our Data Handbook IC26; Integrated Circuit Packages (document order number 9398 652 90011). There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mount components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mount ICs, or for printed-circuit boards with high population densities. In these situations reflow soldering is often used. 14.2 Surface mount packages 14.2.1 Reflow soldering Reflow soldering requires solder paste (a suspension of fine solder particles, flux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling or pressure-syringe dispensing before package placement. Several methods exist for reflowing; for example, infrared/convection heating in a conveyor type oven. Throughput times (preheating, soldering and cooling) vary between 100 and 200 seconds depending on heating method. Typical reflow peak temperatures range from 215 to 250 C. The top-surface temperature of the packages should preferable be kept below 230 C. 14.2.2 Wave soldering Conventional single wave soldering is not recommended for surface mount devices (SMDs) or printed-circuit boards with a high component density, as solder bridging and non-wetting can present major problems. To overcome these problems the double-wave soldering method was specifically developed. If wave soldering is used the following conditions must be observed for optimal results: * Use a double-wave soldering method comprising a turbulent wave with high upward pressure followed by a smooth laminar wave. * For packages with leads on two sides and a pitch (e): - larger than or equal to 1.27 mm, the footprint longitudinal axis is preferred to be parallel to the transport direction of the printed-circuit board; - smaller than 1.27 mm, the footprint longitudinal axis must be parallel to the transport direction of the printed-circuit board. The footprint must incorporate solder thieves at the downstream end. * For packages with leads on four sides, the footprint must be placed at a 45 angle to the transport direction of the printed-circuit board. The footprint must incorporate solder thieves downstream and at the side corners. 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 25 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar During placement and before soldering, the package must be fixed with a droplet of adhesive. The adhesive can be applied by screen printing, pin transfer or syringe dispensing. The package can be soldered after the adhesive is cured. Typical dwell time is 4 seconds at 250 C. A mildly-activated flux will eliminate the need for removal of corrosive residues in most applications. 14.2.3 Manual soldering Fix the component by first soldering two diagonally-opposite end leads. Use a low voltage (24 V or less) soldering iron applied to the flat part of the lead. Contact time must be limited to 10 seconds at up to 300 C. When using a dedicated tool, all other leads can be soldered in one operation within 2 to 5 seconds between 270 and 320 C. 14.3 Through-hole mount packages 14.3.1 Soldering by dipping or by solder wave The maximum permissible temperature of the solder is 260 C; solder at this temperature must not be in contact with the joints for more than 5 seconds. The total contact time of successive solder waves must not exceed 5 seconds. The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified maximum storage temperature (Tstg(max)). If the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. 14.3.2 Manual soldering Apply the soldering iron (24 V or less) to the lead(s) of the package, either below the seating plane or not more than 2 mm above it. If the temperature of the soldering iron bit is less than 300 C it may remain in contact for up to 10 seconds. If the bit temperature is between 300 and 400 C, contact may be up to 5 seconds. 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 26 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar 14.4 Package related soldering information Table 31: Suitability of IC packages for wave, reflow and dipping soldering methods Mounting Through-hole mount Surface mount Package Soldering method Wave DBS, DIP, HDIP, SDIP, SIL suitable [2] BGA, SQFP HLQFP, HSQFP, HSOP, HTSSOP, SMS PLCC [4], SO, SOJ LQFP, QFP, TQFP SSOP, TSSOP, VSO [1] Reflow [1] Dipping - suitable suitable suitable suitable suitable suitable - - - - - not suitable not suitable [3] suitable not recommended [4] [5] not recommended [6] [2] [3] [4] [5] [6] All surface mount (SMD) packages are moisture sensitive. Depending upon the moisture content, the maximum temperature (with respect to time) and body size of the package, there is a risk that internal or external package cracks may occur due to vaporization of the moisture in them (the so called popcorn effect). For details, refer to the Drypack information in the Data Handbook IC26; Integrated Circuit Packages; Section: Packing Methods. For SDIP packages, the longitudinal axis must be parallel to the transport direction of the printed-circuit board. These packages are not suitable for wave soldering as a solder joint between the printed-circuit board and heatsink (at bottom version) can not be achieved, and as solder may stick to the heatsink (on top version). If wave soldering is considered, then the package must be placed at a 45 angle to the solder wave direction. The package footprint must incorporate solder thieves downstream and at the side corners. Wave soldering is only suitable for LQFP, QFP and TQFP packages with a pitch (e) equal to or larger than 0.8 mm; it is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.65 mm. Wave soldering is only suitable for SSOP and TSSOP packages with a pitch (e) equal to or larger than 0.65 mm; it is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.5 mm. 15. Revision history Rev Date 01 CPCN Description This data sheet supersedes the version of 1998 Mar 25 (9397 750 03282): 990416 - * * * * * The format of this specification has been redesigned to comply with Philips Semiconductors' new presentation and information standard Added Figure 3 "Device diode protection diagram." on page 3 Added Figure 4 "Voltage-low detection." on page 5 Added paragraph in Section 8.5 "Voltage-low detector and clock monitor" on page 5 Added Figure 14 to 17 on page 18 in Section 10. 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 27 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar 16. Data sheet status Datasheet status Objective specification Preliminary specification Product status Development Qualification Definition [1] This data sheet contains the design target or goal specifications for product development. Specification may change in any manner without notice. This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. This data sheet contains final specifications. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. Product specification Production [1] Please consult the most recently issued data sheet before initiating or completing a design. 17. Definitions Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition -- Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information -- Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification. customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes -- Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no licence or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. 19. Licenses Purchase of Philips I2C components Purchase of Philips I2C components conveys a license under the Philips' I2C patent to use the components in the I2C system provided the system conforms to the I2C specification defined by Philips. This specification can be ordered using the code 9398 393 40011. 18. Disclaimers Life support -- These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors 9397 750 04855 (c) Philips Electronics N.V. 1999 All rights reserved. Product specification 16 April 1999 28 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar Philips Semiconductors - a worldwide company Argentina: see South America Australia: Tel. +61 29 805 4455, Fax. +61 29 805 4466 Austria: Tel. +43 160 101, Fax. +43 160 101 1210 Belarus: Tel. +375 17 220 0733, Fax. +375 17 220 0773 Belgium: see The Netherlands Brazil: see South America Bulgaria: Tel. +359 268 9211, Fax. +359 268 9102 Canada: Tel. +1 800 234 7381 China/Hong Kong: Tel. +852 2 319 7888, Fax. +852 2 319 7700 Colombia: see South America Czech Republic: see Austria Denmark: Tel. +45 3 288 2636, Fax. +45 3 157 0044 Finland: Tel. +358 961 5800, Fax. +358 96 158 0920 France: Tel. +33 14 099 6161, Fax. +33 14 099 6427 Germany: Tel. +49 40 23 5360, Fax. +49 402 353 6300 Hungary: see Austria India: Tel. +91 22 493 8541, Fax. +91 22 493 8722 Indonesia: see Singapore Ireland: Tel. +353 17 64 0000, Fax. +353 17 64 0200 Israel: Tel. +972 36 45 0444, Fax. +972 36 49 1007 Italy: Tel. +39 26 752 2531, Fax. +39 26 752 2557 Japan: Tel. +81 33 740 5130, Fax. +81 33 740 5077 Korea: Tel. +82 27 09 1412, Fax. +82 27 09 1415 Malaysia: Tel. +60 37 50 5214, Fax. +60 37 57 4880 Mexico: Tel. +9-5 800 234 7381 Middle East: see Italy Netherlands: Tel. +31 40 278 2785, Fax. +31 40 278 8399 New Zealand: Tel. +64 98 49 4160, Fax. +64 98 49 7811 Norway: Tel. +47 22 74 8000, Fax. +47 22 74 8341 Philippines: Tel. +63 28 16 6380, Fax. +63 28 17 3474 Poland: Tel. +48 22 612 2831, Fax. +48 22 612 2327 Portugal: see Spain Romania: see Italy Russia: Tel. +7 095 755 6918, Fax. +7 095 755 6919 Singapore: Tel. +65 350 2538, Fax. +65 251 6500 Slovakia: see Austria Slovenia: see Italy South Africa: Tel. +27 11 470 5911, Fax. +27 11 470 5494 South America: Tel. +55 11 821 2333, Fax. +55 11 829 1849 Spain: Tel. +34 33 01 6312, Fax. +34 33 01 4107 Sweden: Tel. +46 86 32 2000, Fax. +46 86 32 2745 Switzerland: Tel. +41 14 88 2686, Fax. +41 14 81 7730 Taiwan: Tel. +886 22 134 2865, Fax. +886 22 134 2874 Thailand: Tel. +66 27 45 4090, Fax. +66 23 98 0793 Turkey: Tel. +90 212 279 2770, Fax. +90 212 282 6707 Ukraine: Tel. +380 44 264 2776, Fax. +380 44 268 0461 United Kingdom: Tel. +44 181 730 5000, Fax. +44 181 754 8421 United States: Tel. +1 800 234 7381 Uruguay: see South America Vietnam: see Singapore Yugoslavia: Tel. +381 11 62 5344, Fax. +381 11 63 5777 For all other countries apply to: Philips Semiconductors, Marketing & Sales Communications, Building BE, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 272 4825 Internet:http://www.semiconductors.philips.com 9397 750 04855 (c) Philips Electronics N.V. 1999. All rights reserved. Product specification 16 April 1999 29 of 30 Philips Semiconductors PCF8563 Real-time clock/calendar Contents 1 2 3 4 5 6 7 7.1 7.2 8 8.1 8.2 8.3 8.4 8.5 8.6 8.6.1 8.6.2 8.6.3 8.6.4 8.6.5 8.6.6 8.6.7 General description. . . . . . . . . . . . . . . . . . Features . . . . . . . . . . . . . . . . . . . . . . . . . . . Applications. . . . . . . . . . . . . . . . . . . . . . . . Quick reference data. . . . . . . . . . . . . . . . . Ordering information . . . . . . . . . . . . . . . . Block diagram . . . . . . . . . . . . . . . . . . . . . . Pinning information . . . . . . . . . . . . . . . . . Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . Pin description . . . . . . . . . . . . . . . . . . . . . Functional description . . . . . . . . . . . . . . . Alarm function modes. . . . . . . . . . . . . . . . Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . CLKOUT output . . . . . . . . . . . . . . . . . . . . Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . Voltage-low detector and clock monitor . . Register organization . . . . . . . . . . . . . . . . Control/Status 1 register . . . . . . . . . . . . . . Control/Status 2 register . . . . . . . . . . . . . . Seconds, Minutes and Hours registers . . . . 1 1 1 2 2 2 3 3 3 4 4 4 4 5 5 5 6 7 8 16 17 18 19 Data sheet status . . . . . . . . . . . . . . . . . . . Definitions . . . . . . . . . . . . . . . . . . . . . . . . Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . Licenses . . . . . . . . . . . . . . . . . . . . . . . . . . 28 28 28 28 Days, Weekdays, Months/Century and Years registers . . . . . . . . . . . . . . . . . . . . . . . . . 8 Alarm registers. . . . . . . . . . . . . . . . . . . . 10 CLKOUT frequency register. . . . . . . . . . . 11 Countdown timer registers. . . . . . . . . . . . 11 8.7 8.7.1 8.8 8.9 8.9.1 8.9.2 8.9.3 8.9.4 8.9.5 9 10 11 12 12.1 13 14 14.1 14.2 14.2.1 14.2.2 14.2.3 14.3 14.3.1 14.3.2 14.4 15 EXT_CLK test mode. . . . . . . . . . . . . . . . Operation example . . . . . . . . . . . . . . . . . Power-On Reset (POR) override mode . Serial interface . . . . . . . . . . . . . . . . . . . . Characteristics of the I2C-bus . . . . . . . . . START and STOP conditions . . . . . . . . . Bit transfer . . . . . . . . . . . . . . . . . . . . . . . Acknowledge . . . . . . . . . . . . . . . . . . . . . I2C-bus protocol . . . . . . . . . . . . . . . . . . . Limiting values . . . . . . . . . . . . . . . . . . . . Static characteristics . . . . . . . . . . . . . . . Dynamic characteristics . . . . . . . . . . . . . Application information . . . . . . . . . . . . . Quartz crystal frequency adjustment . . . Package outline . . . . . . . . . . . . . . . . . . . . Soldering . . . . . . . . . . . . . . . . . . . . . . . . . Introduction . . . . . . . . . . . . . . . . . . . . . . Surface mount packages . . . . . . . . . . . . Reflow soldering. . . . . . . . . . . . . . . . . . . Wave soldering . . . . . . . . . . . . . . . . . . . Manual soldering . . . . . . . . . . . . . . . . . . Through-hole mount packages. . . . . . . . Soldering by dipping or by solder wave . . . Manual soldering . . . . . . . . . . . . . . . . . . Package related soldering information . . Revision history . . . . . . . . . . . . . . . . . . . 12 12 12 13 13 13 14 14 15 16 17 19 21 21 22 25 25 25 25 25 26 26 26 26 27 27 (c) Philips Electronics N.V. 1999. Printed in The Netherlands All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. Date of release: 16 April 1999 Document order number: 9397 750 04855 |
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