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| evaluate: ds3231m or ds3232m ds3231mz/ds3232m evaluation kits general description the ds3231mz/ds3232m (ds323x) evaluation kit (ev kit) is a fully assembled and tested circuit board with an accompanying application program that demonstrates the operation of the ds3231m or ds3232m tempera - ture-compensated real-time clocks. the ds3231m and ds3232m i 2 c real-time clocks contain an internal silicon (mems) resonator for its timekeeping reference. both components constantly monitor the operating tempera - ture, periodically adjusting the internal oscillator frequen - cy to maintain highly accurate time information. the ev kit includes one tcxo component soldered onto the demonstration board, a usb i/o communications module for evaluation kits (ds3900h2), and a cd con - taining the application program and instructions. system requirements are a windows ? -compatible pc running windows xp ? , windows vista ? , or later, and a usb port. the ev kit allows for optional user configuration to a single power-supply operation, and the accompanying i 2 c interface and application program provides easy access to manipulate register settings, while observing the various component functions of timekeeping and real- time alarm-initiated interrupts. the ev kit also allows the user to connect their i 2 c master to the sample component for operational verifica - tion and/or code generation. features and beneits aid to fast hardware and software debugging gui-based application for ease of use allows for user-configurable single- or dual-supply operation optional footprint accepts 8-pin or 16-pin so ev kit contents assembled circuit board including the tcxo component usb communications module for evaluation kits (ds3900h2) 19-6896; rev 0; 1/14 ordering information appears at end of data sheet. ev kit photo windows, windows xp, and windows vista are registered trademarks and registered service marks of microsoft corporation. file decription ds323xevkit.exe application program ds3900h vboard vcc gnd 32khz test points pull-up resistors (jumpers j6-j8) vbat rst pushbutton and led ev kit files downloaded from: http:///
maxim integrated 2 www.maximintegrated.com evaluate: ds3231m or ds3232m ds3231mz/ds3232m evaluation kits quick start recommended equipment ? ds3231mz or ds3232m ev kit ? 5v, 1a power supply (ps1 = vboard optional i/o power) ? 5v, 1a power supply (ps2 = vcc device power) ? 5v, 1a power supply (ps3 = vbat backup power) ? windows xp/vista/7 pc with usb capability ? usb-mini type a to type b cable ? oscilloscope (optional) note: in the following sections, software-related items are identified by bolding. text in bold refers to items directly from the ev kit software.procedure the ev kit is fully assembled and tested. follow the steps below to verify the ev kit dual-supply board operation. caution: do not enable the power supplies until all connections are completed. 1) verify that jumpers j6Cj8 are installed, where noted. j6 and j7 connect the 32khz and int /sqw output pin pullup resistors (respectively/if populated) to the vboard bias. j8 connects the rst (active-low) led anode to the vcc bias. 2) if using a separate vboard (i/o) power supply, connect the ps1 power supply across the vboard (j5) and gnd (j4) connectors. if i/o power is going to be derived from the vcc supply, connect a banana jumper from vboard (j5) to vcc (j2). 3) connect the ps2 power supply across the vcc (j2) and gnd (j4) connectors. 4) connect the ps3 power supply across the vbat (j3) and gnd (j4) connectors. 5) set ps3 for +3v, 100ma, and enable the ps3 output. 6) set ps2 for +3.3v, 200ma, and enable the ps2 output. the reset led (d1) illuminates for ~250ms. 7) if using separate vboard power, set ps1 for +3.3v, 200ma, and enable the ps1 output. 8) connect the usb cable (not provided) from the pc to the ds3900h2 mini-b usb connector. the d2 led will illuminate red/blinking. allow windows time to recognize the new usb device and load the device driver before proceeding. see the software procedure section. software procedure ds3900 usb-to-i 2 c setup note: the ds3900h2 is the small daughter card located on the top-left corner of the ev kit. it converts usb to i 2 c and allows the gui to communicate to the ds323x. it is important to allow windows the time necessary to install the device driver, prior to first use. when initially connecting the usb cable, windows should automatically recognize this new usb device. wait until you see the message indicating that the device is ready for use. the application is a self-contained exe file and can now be executed from the cd or copied to any directory on the pc. no installation script is required, nor included. device prompt on program start, select the appropriate device type and click on ok (see figure 1 ). if i/o is operational, the d2 led turns green and the application automatically proceeds to the monitor tab display (see figure 3 ). if i/o initialization fails, an error message is displayed (see figure 2 ). to ignore the i/o error and simply browse the gui in demo mode (i.e., screen display only), click ok to view the tabs. no component or i/o operations are active in demo mode. otherwise, power off all supplies, recheck the connections, exit, and restart the application. downloaded from: http:/// maxim integrated 3 www.maximintegrated.com evaluate: ds3231m or ds3232m ds3231mz/ds3232m evaluation kits detailed description of software monitor tab the monitor tab graphical user interface (gui) screen is organized into several basic sections, as highlighted in figure 3 . when entering the monitor tab, an i/o read of the component registers automatically executes to display the present contents in a human-formatted graphical display. new register values can be entered into the appropriate registers by field using the monitor tab, or alternatively, by hexadecimal register address using the memory tab (see figure 6 ). in each section of the monitor tab, the component settings can be manually written or read using the read or write buttons provided in that section. double-click in the field desired to enter new data. a maxim integrated 4 www.maximintegrated.com evaluate: ds3231m or ds3232m ds3231mz/ds3232m evaluation kits figure 3. monitor tab real-time clock control register status register session log application info temperature sensor alarm 1 or 2 settings downloaded from: http:/// maxim integrated 5 www.maximintegrated.com evaluate: ds3231m or ds3232m ds3231mz/ds3232m evaluation kits figure 4. monitor loop downloaded from: http:/// maxim integrated 6 www.maximintegrated.com evaluate: ds3231m or ds3232m ds3231mz/ds3232m evaluation kits power switching in dual-voltage configuration, and to facilitate testing the battery-related timekeeping or alarm functions, follow the steps below: 1) with the power supplies enabled and the application running, stop any real-time monitoring. 2) load and verify time and/or alarm values, as needed. note: do not exit the application. 3) set ps1 (vboard) to 0v. 4) set ps2 (vcc) to 0v. the reset led illuminates momentarily as the supply voltage falls below v pf . note: the component is now being powered by ps3 (vbat). to restore i/o, restore ps2 (vcc) and ps1 (vboard) to their valid conditions (in that order) and return to the desired application operation. changing tabs to go to the desired tab, simply click on a tab located in the upper left-hand corner (see figure 5 ). for example, to select the memory tab, click on memory ; to select the monitor tab, click on monitor. memory tab the memory tab (see figure 6) includes a series of manual dialog boxes, providing basic i 2 c communication strings to pass to and from the ev kit. buttons have been provided to execute four unique single-byte write or read instructions, two dual-byte write or read instructions, a singular bit-wise modification tool, a burst write or read of the components rtc registers, two multi-byte (8 byte) write or read instructions, and (if ds3232m is selected) a memory fill tool for the nv sram. a session log and application information are also presented. unused dialog boxes display - until some user-initiated action has occurred in that write or read dialog. double-click in the addr box to enter a hex register address; tab to the data box to enter new data. click on the appropriate write or read button to execute the i/o transmission. figure 5. changing tabs downloaded from: http:/// maxim integrated 7 www.maximintegrated.com evaluate: ds3231m or ds3232m ds3231mz/ds3232m evaluation kits figure 6. memory tab single-byte i/o bit-wise i/o dual-byte i/o slave finder memory fill applications info mode (burst) i/o multi-byte i/o session log downloaded from: http:/// maxim integrated 8 www.maximintegrated.com evaluate: ds3231m or ds3232m ds3231mz/ds3232m evaluation kits register programming as previously noted, the monitor tab read or write buttons are assigned and function within the predefined section of the targeted component under evaluation. for example, clicking the read button in the real time clock group box executes a device read of only the seven rtc registers (00hC06h) and displays the result in a human-formatted 8-field display. on the memory tab, the general-purpose single-byte and dual-byte write and read functions are not predefined for any specific register or component function. the user must enter a register address, as well as the new data to be written (if applicable), and then manually initiate the i/o transfer by clicking on the read or write button. whenever a write button is clicked, the new data is sent to the component and a subsequent verification read is automatically executed. the data field then displays the verified contents of that register. examples read register 0eh (using a one-byte read) place the cursor on any one of the four optional addr boxes in the one byte reads/writes group box. left- click to open the box and enter the hexadecimal address (in this case, e is sufficient and preceding zeros can be omitted). click on the read button to the right of that addr box and the data field displays the content of the register (in hexadecimal). the session log also records a transaction. write 04h to control register 0eh (using a one- byte write) place the cursor on any one of the four optional addr boxes in the one byte reads/writes group box. left- click to open the box and enter the hexadecimal address (in this case, e is sufficient and preceding zeros can be omitted). tab to the next field (or move the cursor manu - ally), and enter the new data (in this case, 4 is sufficient). click on the write button to the right of that addr box and the data field displays the new verified content of the register (in hexadecimal). the session log also records a transaction. read registers 0eh and 0fh (using a two-byte read) utilizing the internal address autoincrement feature of the component, the user can read two adjacent registers in one i/o transaction. place the cursor on either one of the two optional addr boxes in the two byte read/write group box. left-click to open the box and enter the first register address (e is the first and preceding zeros can be omitted). click on the read button to the right of that addr box and the two data fields display the contents of the registers (in hexadecimal) in the order of their addressing. the session log also records a transaction. write 01h to day and 23h to date registers |03hC04h (using a two-byte write) utilizing the internal address autoincrement feature of the component, the user can write two adjacent registers in one i/o transaction. place the cursor on either one of the two optional addr boxes in the two byte read/write group box. left-click to open the box and enter the first register address (3 is the first and preceding zeros can be omitted). tab to the first data field and enter the data for the first register (1). tab to the second data field and enter the new data for the second register (23). click on the write button to the right of that addr box and the data field displays the new verified content of the registers (in hexadecimal). the session log also records a transaction. bit-wise operations to toggle osf bit in the status register (0fh) one single-byte window is designated for bit-wise operations. place the cursor on the addr box in the bitwise operations group box. left-click to open the box and enter the hexadecimal address (in this case, f is sufficient and preceding zeros can be omitted). click on the read button to the right of that addr box and the data box displays the content of the register (in hex - adecimal); directly below that box, each bit is represented in its weighted position by a 1 or 0. assuming the register contents were initially found to be 83h (osf, a2f, and a1f), the display should show data = 83 (hex) and 10000011 , respectively. if the user wants to clear only bit 7, then pressing the bit7 button should invert the content of only that specific bit. click on the write button and the data field displays the updated and verified content of the registers (in hexadeci - mal). the session log also records a transaction. downloaded from: http:/// maxim integrated 9 www.maximintegrated.com evaluate: ds3231m or ds3232m ds3231mz/ds3232m evaluation kits mode (burst write or read) read or write buttons in the mode group box are provided to load or read all component rtc registers in sequential address order. memory fill tool to facilitate loading of the ds3232m nv sram data space (14hCffh), a user-definable memory fill tool group box is provided to sequentially load memory space bounded by the start and stop addresses. example: to fill the entire nv sram area with aah, enter a start address of 14 (hex), a stop address of ff (hex), a data of aa (hex), and click on the fill now button. verification (reads) can be accomplished using either a single, dual, or multiple (8) byte read function. find i 2 c slave addresses to validate i 2 c communications, the find button in the find i2c slave addresses group box queries for all slave addresses presently connected to the sda bus. pushbutton reset detection the ev kit provides an external, manual pushbutton switch that is connected to the rst output pin. when vcc power is present, the rst pin is continuously monitored for a low-going edge on that signal. if an edge is detected, the ds323x component debounces the switch by pulling the rst line low (illuminating d1). after a timeout has expired, the ds323x releases rst to restart the cpu. whenever vcc is valid, depressing switch s1 pulls the reset line to ground and illuminates d1 (red led) for ~250ms from the release of the pushbutton. the rst output function and d1 led are not available when component power is provided from vbat. applications information on the monitor or memory tabs, in the lower right-hand corner, the application displays: the device type selected when the program was started the software revision identity (see figure 7 ) in the lower left-hand corner of the monitor tab, the usb identity and firmware version is displayed (see figure 8 ). figure 7. usb version figure 8. apps information downloaded from: http:/// maxim integrated 10 www.maximintegrated.com evaluate: ds3231m or ds3232m ds3231mz/ds3232m evaluation kits single-supply operation the ds323x can operate using three unique power-supply configurations: 1) dual supply (vcc for operation, vbat for backup) 2) single supply (vcc only) 3) single supply (vbat only) the ev kit is assembled for use in dual-supply mode. see the quick start section. single-supply operation using vcc only to utilize the ev kit in vcc-only mode, connect a banana cable from vbat (j3) to gnd (j4); do not use ps3. perform the following: 1) verify that jumpers j6Cj8 are installed (where noted). j6 and j7 connect the 32khz and int /sqw output pin pullup resistors (respectively) to the vboard bias. j8 connects the rst (active-low) led anode to the vcc bias. 2) if using a separate vboard (i/o) power supply, connect the ps1 power supply across the vboard (j5) and gnd (j4) connectors. if i/o power is going to be derived from the vcc supply, connect a banana jumper from vboard (j5) to vcc (j2). 3) connect the ps2 power supply across the vcc (j2) and gnd (j4) connectors. 4) verify that a usb cable (not provided) is properly connected from the pc to the ds3900h2 mini-usb connector. 5) set ps2 for +3.3v, 200ma, and enable the ps2 output. the reset led illuminates for ~250ms. 6) if using separate vboard power, set ps1 for +3.3v, 200ma and enable the ps1 output. see the software procedure section. single-supply operation using vbat only to utilize the ev kit in vbat-only mode, connect a banana cable from vcc (j2) to gnd (j4); do not use ps2. perform the following: 1) verify that component c3 (0.1f 0805 smt capacitor) is placed (from vbat to gnd) on the pads labeled c3 (bottom side of the ev kit board). 2) verify that jumpers j6 and j7 are installed (where noted). j6 and j7 connect the 32khz and int /sqw output pin pullup resistors (respectively) to the vboard bias. j8 is not used; the rst output is not operational in the vbat-only power configuration. 3) if using a separate vboard (i/o) power supply, connect the ps1 power supply across the vboard (j5) and gnd (j4) connectors. if i/o power is going to be derived from the vbat supply, connect a banana jumper from vboard (j5) to vbat (j3). 4) connect the ps3 power supply across the vbat (j3) and gnd (j4) connectors. 5) verify that a usb cable (not provided) is connected from the pc to the ds3900h2 mini-usb connector. 6) set ps3 for +3v, 100ma, and enable the ps3 output. 7) if using separate vboard power, set ps1 for +3.3v, 200ma, and enable the ps1 output. see the software procedure section. user-provided i 2 c bus master if desired, the user can configure the ev kits to operate from an existing i 2 c bus master, providing external pullup resistors already existing on that communications bus. perform the following: 1) power off all the supplies. 2) disconnect the usb cable and remove the ds3900h2 subassembly from the ev kit by lifting the module vertically from its headers. 3) connect vboard to the desired i/o power reference (from the customers board). 4) connect gnd to the ground reference from the customers board. 5) jumper the sda signal from the sda test point to sda on the customers board. 6) jumper the scl signal from the scl test point to scl on the customers board. 7) if using dual-supply mode, power on the vbat supply. 8) power on the vcc supply. 9) power on the customers board. see the software procedure section. downloaded from: http:/// maxim integrated 11 www.maximintegrated.com evaluate: ds3231m or ds3232m ds3231mz/ds3232m evaluation kits component list # denotes an rohs-compliant device that may include lead(pb) that is exempt under the rohs requirements. +denotes a lead(pb)-free/rohs-compliant package. designation qty description c1, c6 2 0.1f x7r ceramic capacitors (0805) tdk cga4j2x7r2a104k c2 1 0.01f x7r ceramic capacitor (0805) tdk c2012x7r2a103kt c3 1 0.1f x7r ceramic capacitor (0805) c4 1 47f 16v 20% tantalum capacitor vishay/sprague 595d476x0016c2t c5 1 1f x7r ceramic capacitor (0805) tdk cgj4j2x7r1c105k d1 1 led j1 1 right-angle bnc amp 5227161-1 j2 1 red banana jackdeltron 571-0500 j3 1 yellow banana jack deltron 571-0700 j4 1 black banana jackdeltron 571-0100 designation qty description j5 1 blue banana jackdeltron 571-0200 j6Cj8 3 2-pin headers 3m 961102-6404-ar or sullins spc02syan r1, r2 2 10k? 1% resistors (0805) r3 1 499? 1% resistor (0805) s1 1 pushbutton switchc&k ksr231glfs u1 1 5ppm, i 2 c real-time clock (8 so) maxim ds3231mz+ 5ppm, i 2 c real-time clock with sram (8 so) maxim ds3232mz+ u2 1 usb hid communications module for evaluation kits maxim ds3900h2evkit# u3 2 header, 8 x 2 fci 67997-116hlf 1 pcb: ds323x ev kit downloaded from: http:/// maxim integrated 12 www.maximintegrated.com evaluate: ds3231m or ds3232m ds3231mz/ds3232m evaluation kits figure 9. ds323x ev kit schematic downloaded from: http:/// maxim integrated 13 www.maximintegrated.com evaluate: ds3231m or ds3232m ds3231mz/ds3232m evaluation kits figure 10. ds323x ev kit pcb layouttop figure 11. ds323x ev kit pcb layoutbottom downloaded from: http:/// maxim integrated 14 www.maximintegrated.com evaluate: ds3231m or ds3232m ds3231mz/ds3232m evaluation kits #denotes an rohs-compliant device that may include lead(pb) that is exempt under the rohs requirements. part type ds3231mz evkit# ev kit ds3232m evkit# ev kit ordering information downloaded from: http:/// maxim integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim integrated product. no circuit patent licenses are implied. maxim integrated reserves the right to change the circuitry and speciications without n otice at any time. maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. ? 2014 maxim integrated products, inc. 15 evaluate: ds3231m or ds3232m ds3231mz/ds3232m evaluation kits revision number revision date description pages changed 0 1/14 initial release revision history for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com. downloaded from: http:/// |
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