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Preliminary W541E260
4-BIT FLASH EPROM MICROCONTROLLER
GENERAL DESCRIPTION
The W541E260 is fully compatible with W741E260 in terms of pin assignment and IC function. It is a high-performance 4-bit microcontroller (C) that provides an LCD driver and the flash EEPROM for the program memory. The device contains a 4-bit ALU, two 8-bit timers, two dividers (for two oscillators) in dual-clock operation, a 32 x 4 LCD driver, and five 4-bit I/O ports (including 1 output port for LED driving). There are also five interrupt sources and a 8-level subroutine nesting for interrupt applications. The W541E260 operates on very low current and has three power reduction modes, hold mode and stop mode in single-clock operation and the dual-clock slow operation, which help to minimize power dissipation. This chip is available for W541C250 and W541C260 bodies, which can be selected by option code. The W541E260 is suitable for end product manufacturer engineering testing and earlier samples before mass production.
FEATURES
* Operating voltage: 2.4V to 5.5V (LCD drive voltage: 3.0V, or 4.5V) * Crystal/Ceramic oscillator: up to 4 MHz * RC oscillator: up to 4 MHz * Dual-clock operation is selected by code option * Main oscillator
- Crystal or RC oscillation circuit can be selected by code option - In crystal mode, high-frequency (400 KHz to 4 MHz) or low-frequency (32.768 KHz) oscillation should be selected by code option - In RC mode, attention must be paid to the high/low frequency oscillation option, because the LCD driver frequency and the ROM code emulation time are related to this option.
* Sub-oscillator
- Connect to 32768 Hz crystal only - Used in dual-clock operation
* Memory
- 2048 x 16-bit program flash EEPROM (including 2K x 4-bit look-up table) - 128 x 4-bit data RAM (including 16 working registers) - 32 x 4 LCD data RAM
* 21 input/output pins
- Ports for input only: 2 ports/8 pins - Input/output ports: 2 ports/8 pins - High sink current for LED driving: 1 port/4 pins - MFP output pin: 1 pin (MFP) - Do not be floating when it is as input or output open-drain (NMOS type). Publication Release Date: June 2003 Revision A2
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W541E260
* Power-down mode
- Hold function: no operation (excluding main oscillator and sub-oscillator) - Stop function: no operation (excluding sub-oscillator) - Dual-clock slow operation mode: system is operated by the sub-oscillator (FOSC = Fs and Fm is stopped)
* Five types of interrupts
- Four internal interrupts (Divider0, Divider1, Timer0, Timer1) for W541C260 body; three internal interrupts (Divider0, Timer0, Timer1) for W541C250 body. - One external interrupt (RC Port) for W541C260 body; two external interrupts (RC port and INT pin) for W541C250 body. * LCD driver output - 32 segment x 4 common - Static, 1/2 duty (1/2 bias), 1/3 duty (1/2 or 1/3 bias), 1/4 duty (1/3 bias) driving mode can be selected - LCD driver output pins can be used as DC output port by code option - Clock source can be main oscillator clock in the single-clock operation mode, or sub-oscillator clock in the dual-clock operation mode; operation mode is selected by code option
* MFP output pin
- Output is software selectable as modulating or non-modulating frequency - Works as frequency output specified by Timer 1
* Two built-in 14-bit frequency dividers
- Divider0: the clock source is the output of the main oscillator - Divider1: the clock source is the output of the sub-oscillator
* Two built-in 8-bit programmable countdown timers
- Timer 0: one of two internal clock frequencies (FOSC/4 or FOSC/1024) can be selected - Timer 1: includes an auto-reload function and one of two internal clock frequencies (FOSC or FOSC/64) can be selected, or falling edge of pin RC.0 can be selected (output through MFP pin)
* Built-in 18/14-bit watchdog timer selectable for system reset
- Enable/Disable the watchdog timer can be controlled by command or by option code; the control source (command or option code) can be determined by another option code
* Powerful instruction set: 115 instructions for W541C260 body
119 instructions for W541C250 body
* 8-level subroutine (include interrupt) nesting * Up to 1 S instruction cycle (with 4 MHz operating frequency) * Packaged in 80-pin QFP
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W541E260
BLOCK DIAGRAM
RAM (128*4)
PORT RA VPP (RES) DATA (RA3) MODE (INT) Flash EEPROM (2048*16)
(look_up table 2K*4)
+1(+2)
RA0 to 3
ACC PORT RB RB0 to 3
ALU
PORT RC PC
RC0 to 3
Central Control Unit
IEF HEF EVF PEF SEF
PORT RD
RD0 to 3
STACK (8 Levels)
HCF
PSR0 PSR1 PSR2 PR MR0 PM0
PORT RT
SEL
.
.
.
RE0 to 3
(RE0/DOUT, RE1/CLKO, RE2/DIN, RE3/CLKI)
Serial I/O
MUX
Timer 0 (8-bit)
Timer 1 (8-bit)
Modulation Frequency Pulse
SEL
MUX
MFP
Watchdog Timer (4-bit)
Divider 0 (14-bit)
VDD VSS Timing Generator RES INT
XIN
XOUT
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Publication Release Date: June 2003 Revision A2
W541E260
PIN CONFIGURATION
O X O U T 2
/ RRMI FN AA 10PT
/ X R I ENN SC1
X X U V I O DNN TN 1CDC2
VV M DDDD O DNHHDD EC1212
V D D 3
S E G 3 1
S E G 3 0
S E G 2 9
S E G 2 8
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 RA2 RA3 RB0 RB1 RB2 RB3 RC0 RC1 RC2 RC3 RD0 RD1 RD2 RD3 RE0 RE1 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 SEG27 SEG26 SEG25 SEG24 SEG23 SEG22 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12
NNRRVVDCC CCEESPAOO 2 3 SPT MM A32
C O M 1
C O M 0
S E G 0
S E G 1
S E G 2
S E G 3
S E G 4
S E G 5
S E G 6
S E G 7
S E G 8
S E G 9
S E G 1 0
SN EC G 1 1
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W541E260
PAD DESCRIPTION
SYMBOL XIN1 I/O I FUNCTION Input pin for oscillator. Connected to crystal or resistor to generate system clock by code option. External 10~20pF capacitor uses to get accurate freq in crystal mode. Output pin for oscillator. Connected to crystal or resistor to generate system clock by code option. 20pF capacitor is built in internal for crystal mode. Input pin for sub-oscillator. Connected to 32.768 KHz crystal. External 10~20pF capacitor uses to get accurate freq in crystal mode. Output pin for sub-oscillator with internal oscillation capacitor. Built-in 20pF capacitor. Connected to 32.768 KHz crystal. Input/Output port. Input/output mode specified by port mode 1 register (PM1). Input/Output port. Input/output mode specified by port mode 2 register (PM2). 4-bit port for input only. Each pin has an independent interrupt capability. 4-bit port for input only. Output port only.This port provides high sink current to drive LEDs. Output pin only. This pin can output modulating or nonmodulating frequency, or Timer 1 clock output specified by mode register 1 (MR1). System reset pin with pull-high resistor. External interrupt pin with pull-high resistor. This pin is bonding option for the W541C250 body. LCD segment output pins.Also can be used as DC output ports specified by option codes. LCD common signal output pins.
Static COM0 COM1 COM2 COM3 Used Not Used Not Used Not Used 1/2 Duty Used Used Not Used Not Used 1/3 Duty Used Used Used Not Used 1/4 Duty Used Used Used Used
XOUT1
O
XIN2 XOUT2 RA0 to RA3 RB0 to RB3 RC0 to RC3 RD0 to RD3 RE0 to RE3 MFP
RES INT
I O I/O I/O I I O O I I O O
SEG0 to SEG31 COM0 to COM3
The LCD alternating frequency can be selected by code option. DH1, DH2 VDD1,VDD2, VDD3 I I Connection terminals for voltage doubler (halver) capacitor. Positive (+) supply voltage terminal. Refer to Functional Description.
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Publication Release Date: June 2003 Revision A2
W541E260
Pin description, continued
SYMBOL VDD VSS VPP MODE DATA
I/O I I I I I/O Positive power supply (+). Negative power supply (-).
FUNCTION
Voltage control pin for the flash EEPROM programming, erasing and verifying. This pin has a built-in pull-low resistor. Mode selection pin for the flash EEPROM programming, erasing and verifying. This pin has a built-in pull-low resistor. Data I/O pin for the flash EEPROM programming and verifying. This pin has a built-in pull-low resistor.
ABSOLUTE MAXIMUM RATINGS
PARAMETER Supply Voltage to Ground Potential Applied Input/Output Voltage Power Dissipation Ambient Operating Temperature Storage Temperature RATING -0.3 to +7.0 -0.3 to +7.0 120 0 to +70 -55 to +150 UNIT V V mW C C
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device.
DC CHARACTERISTICS
(VDD-VSS = 3.0V, Fm = 4. MHz, Fs = 32.768 KHz, Ta = 25 C, LCD on; unless otherwise specified)
PARAMETER Op. Voltage Op. Current (Crystal type)
SYM. VDD IOP1
CONDITIONS No load (Ext-V) In dual-clock normal operation No load (Ext-V) In dual-clock normal operation No load (Ext-V) In dual-clock slow operation and Fm is stopped Hold mode No load (Ext-V) In dual-clock normal operation -6-
MIN. 2.4 -
TYP. 0.6
MAX. 5.5 2.5
UNIT V mA
Op. Current (RC type)
IOP2
-
1
4
mA
Op. Current (Crystal type)
IOP3
-
8.5
20
A
Hold Current (Crystal type)
IHM1
-
280
450
A
W541E260
A
Hold Current (RC type)
IHM2
Hold mode No load (Ext-V) In dual-clock normal operation Hold mode No load (Ext-V) In dual-clock slow operation and Fm is stopped Stop mode No load (Ext-V) In dual-clock normal operation Stop mode No load (Ext-V) In single-clock operation -
-
500
600
Hold Current (Crystal type) Stop Current (Crystal type) Stop Current (Crystal type) Input Low Voltage
IHM3
-
4.0
6
A
ISM1
-
4.0
6
A
ISM2 VIL
VSS
0.1 -
2 0.3 VDD
A V
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Publication Release Date: June 2003 Revision A2
W541E260
DC Characteristics, continued
PARAMETER Input High Voltage MFP Output Low Voltage MFP Output High Voltage Port RA, RB Output Low Voltage Port RA, RB Output high Voltage LCD Supply Current SEG0-SEG31 Sink Current (Used as LCD output) SEG0-SEG31 Drive Current (Used as LCD output) Segment output low voltage (Used as DC output) Segment output high voltage (Used as DC output) Port RE Sink Current Port RE Source Current Input Port Pull-up Resistor
INT Pull-up Resistor RES Pull-up Resistor
SYM. VIH VML VMH VABL VABH ILCD IOL1
CONDITIONS IOL = 3.5 mA IOH = 3.5 mA IOL = 2.0 mA IOH = 2.0 mA All Seg. ON VOL = 0.4V VLCD = 0.0V VOH = 2.4V VLCD = 3.0V IOL = 0.6 mA
MIN. 0.7 VDD 2.4 2.4 0.4
TYP. -
MAX. VDD 0.4 0.4 6 -
UNIT V V V V V A A
IOH1
0.3
-
-
A
VSL
-
-
0.4
V
VSH
IOH = 3 A
2.4
-
-
V
IEL IEH RCD RINT RRES RVPP RMODE RDATA
VOL = 0.9V VOH = 2.4V Port RC, RD VDD = 5V VDD = 5V VDD = 5V
9 0.4 100 50 50 500 500 20
1.2 300 150 150 1000 1000 65
500 500 500 1500 1500 150
mA mA K K K K K K
VPP Pull-down Resistor MODE Pull-down Resistor DATA Pull-down Resistor
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W541E260
AC CHARACTERISTICS
(VDD-VSS = 3.0V, Ta = 25 C; unless otherwise specified)
PARAMETER
SYM.
CONDITIONS RC type
MIN. 400 -
TYP. 32.768 -
MAX. 4000 3580 10
UNIT
Op. Frequency
FOSC
Crystal type 1 (Option low speed type) Crystal type 2 (Option high speed type)
KHz
Frequency Deviation by Voltage Drop for RC Oscillator (low freq.) Instruction Cycle Time Reset Active Width Interrupt Active Width
f f TI TRAW TIAW
f(3V) - f(2.4V) f(3V) One machine cycle FOSC = 32.768 KHz FOSC = 32.768 KHz
%
1 1
4/FOSC -
-
mS S S
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Publication Release Date: June 2003 Revision A2
W541E260
TYPICAL APPLICATION CIRCUIT
Vcc
VDD RA0 Output Signal RA3 RB0 RB1 RB2 RB3 RC0 RC1 RC2 RC3 RD0 RD1 RD2 RD3 COM3 SEG0 SEG31
0.1 uF
COM0
LCD PANEL (1/3 Bias 1/4 Duty)
DH1 DH2 VDD1 VDD2 VDD3
Connect to capacitor and VDD to generate LCD voltage Vcc
RES
0.1 uF
XOUT1 XIN1 XOUT2
32.768 KHz
RE0 RE1 RE2 RE3 MFP
Vcc
XIN2
VSS
470 W
0.1 uF
- 10 -
W541E260
PACKAGE DIMENSIONS
80-Lead QFP
HD D
80 65
1
64
E
EH
24
41
25
e
b
40
c
2
AA See Detail F Seating Plane
1
y
A
L L1 Detail F
Symbol
Dimension in inches
Dimension in mm
Min. Nom Max. Min. Nom Max.
0.130 0.004 0.107 0.112 0.117 0.018 0.010 0.556 0.792 0.037 0.752 0.988 0.055 0.103 0.004 0 12 0 0.10 2.73 0.30 0.10 13.87 19.87 0.65 18.49 24.49 1.00 2.21 2.85 0.35 0.15 2.97 0.45 0.25 3.30
A A1 A2 b c D E e HD HE L L1 y 0
0.012 0.014 0.004 0.006 0.546 0.551 0.782 0.787 0.025 0.031 0.728 0.964 0.039 0.087 0.740 0.976 0.047 0.094
14.00 14.13 20.00 20.13 0.80 18.80 24.80 1.20 2.40 0.95 19.10 25.10 1.40 2.62 0.10 12
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Publication Release Date: June 2003 Revision A2

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