W541C250 Data Sheet 4-BIT MICROCONTROLLER Table of Contents1. GENERAL DESCRIPTION ......................................................................................................... 2 2. FEATURES ................................................................................................................................. 2 3. BLOCK DIAGRAM ...................................................................................................................... 4 4. PIN CONFIGURATION ............................................................................................................... 5 5. PIN DESCRIPTION..................................................................................................................... 6 6. ELECTRICAL CHARACTERISTICS........................................................................................... 7 6.1 Absolute Maximum Ratings .......................................................................................... 7 6.2 DC Characteristics ........................................................................................................ 7 6.3 AC Characteristics......................................................................................................... 8 7. APPLICATION CIRCUIT............................................................................................................. 9 8. REVISION HISTORY ................................................................................................................ 10 -1- Publication Release Date: April 14, 2005 Revision A6 W541C250 1. GENERAL DESCRIPTION The W541C250 is fully compatible with W741C250 in the terms of pin assignment and IC functon. It is a high-performance 4-bit microcontroller (C) that provides an LCD driver. The device contains a 4-bit ALU, two 8-bit timers, a divider, a 24 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 8-level subroutine nesting for interrupt applications. The W541C250 operates on low voltage and very low current and has two power reduction modes, hold mode and stop mode, which help to minimize power dissipation. The W541C250 is suitable for remote controllers, watches and clocks, multiple I/O products, keyboard controllers, speech synthesis LSI controllers, and other products. 2. FEATURES * Operating voltage: 2.4 ~ 5.5V (LCD drive voltage: 3.0V, or 4.5V) * Single system clock - Oscillation frequency up to 4 MHz , Crystal or RC oscillator is selected by mask code option , - High-frequency (400 KHz to 4 MHz) or low-frequency (32.768 KHz) oscillation is delected by mask code option * Memory - 2048 x 16 bit program ROM (including 2K x 4 bit look-up table) - 128 x 4 bit data RAM (including 16 working registers) - 24 x 4 LCD data RAM * 21 input/output pins - Ports for input only: 2 ports/8 pins - Input/output ports: 2 ports/8 pins - Port for output only: 1 port /4 pins (high sink current to drive LEDs) - MFP output pin: 1 pin (MFP) - Do not be floating when it is as input or output open-drain (NMOS type). * Power-down mode - Hold function: no operation (except for oscillator) - Stop function: no operation (including main clock) * Five types of interrupts - Three internal interrupts (Divider 0, Timer 0, Timer 1) - Two external interrupt (Port RC and INT pin) -2- W541C250 * LCD driver output - 24 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 ports; selectable by code option * MFP output pin - Output is software selectable as modulating or nonmodulating frequency - Works as frequency output specified by Timer 1 * Built-in 14-bit clock frequency divider circuit * 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 * Powerful instruction set: 119 instructions * 8-level subroutine (include interrupt) nesting * Up to 1 S instruction cycle (with 4 MHz operating frequency) * Packaged in 64-pin QFP -3- Publication Release Date: April 14, 2005 Revision A6 W541C250 3. BLOCK DIAGRAM SEG0 to SEG23 COM0 to COM3 VDD1 to 3 DH1 to 2 LCD DRIVER RAM (128*4) PORT RA RA0 to 3 PORT RB RB0 to 3 PORT RD RD0 to 3 PORT RC RC0 to 3 PORT RE RE0 to 3 ACC ROM (2048*16) ALU (look_up table 2K*4) +1(+2) PC Central Control Unit STACK (8 Levels) IEF HEF PEF HCF EVF SEF PSR0 PR MR1 . Timer 0 (8 Bit) . . Modulation Frequency Pulse Timer 1 (8 Bit) SEL MUX MFP VDD Watchdog Timer (4 Bit) Divider 0 (14 Bit) VSS Timing Generator INT RES XIN -4- XOUT W541C250 4. PIN CONFIGURATION S S S S S V V X D D D D R M / / X O V I R A F N E I U D N N H H D D 0 P T S N T D C C 1 2 1 2 V E E E E E D G G G G G D 2 2 2 2 1 3 3 2 1 0 9 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 RA1 RA2 RA3 RB0 RB1 52 53 32 54 55 30 RB2 RB3 56 57 58 RC0 RC1 59 60 RC2 RC3 RD0 RD1 31 29 28 27 26 25 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 24 SEG11 SEG10 61 62 63 23 22 21 SEG9 SEG8 SEG7 64 20 SEG6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 R R R R R R V N N C C C C S S S S S S D D E E E E S C C O O O O E E E E E E 2 3 0 1 2 3 S M M M M G G G G G G 3 2 1 0 0 1 2 3 4 5 -5- Publication Release Date: April 14, 2005 Revision A6 W541C250 5. PIN DESCRIPTION SYMBOL XIN 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. XOUT O RA0-RA3 I/O Input/Output port. Input/output mode specified by port mode 1 register (PM1). RB0-RB3 I/O Input/Output port. Input/output mode specified by port mode 2 register (PM2). RC0-RC3 I 4-bit port for input only. Each pin has an independent interrupt capability. And build-in schmitt trigger RD0-RD3 I 4-bit port for input only. RE0-RE3 O Output port only. This port provides high sink current to drive LEDs. Connected to crystal or resistor to generate system clock by code option. 20PF capacitor is built in internal for crystal mode. Output pin only. This pin can output modulating or nonmodulating frequency, or Timer 1 clock output specified by mode register 1 (MR1). MFP O INT I External interrupt pin with pull-high resistor. RES I System reset pin with pull-high resistor. SEG0-SEG23 O LCD segment output pins. Can also be used as DC output ports specified by code option. LCD common signal output pins. COM0-COM3 O Static 1/2 Duty 1/3 Duty 1/4 Duty COM0 Used Used Used Used COM1 Not Used Used Used Used COM2 Not Used Not Used Used Used COM3 Not Used Not Used Not Used Used The LCD alternating frequency can be selected by code option. DH1, DH2 I Connection terminals for voltage doubler (halver) capacitor. Positive (+) supply voltage terminal. VDD1, VDD2 VDD3 I Refer to Functional Description. VDD I Positive power supply (+). VSS I Negative power supply (-). -6- W541C250 6. ELECTRICAL CHARACTERISTICS 6.1 Absolute Maximum Ratings RATING UNIT Supply Voltage to Ground Potential PARAMETER -0.3 to +7.0 V Applied Input/Output Voltage -0.3 to +7.0 V 120 mW 0 to +70 C -55 to +150 C Power Dissipation Ambient Operating Temperature Storage Temperature Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device. 6.2 DC Characteristics (VDD-VSS = 3.0V, FOSC. = 32.768 KHz, TA = 25 C; unless otherwise specified) PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT Op. Voltage VDD - 2.4 - 5.5 V Op. Current (Crystal type) IOP1 No load (Ext-V) - 8 20 A Op. Current (RC type) IOP2 No load (Ext-V) - 35 65 A Hold Current (Crystal type) IHM1 Hold mode No load (Ext-V) - 4 6 A Hold Current (RC type) IHM2 Hold mode No load (Ext-V) - 16 40 A Stop Current (Crystal type) ISM1 Stop mode No load (Ext-V) - 0.1 2 A Stop Current (RC type) ISM2 Stop mode No load (Ext-V) - 0.1 2 A Input Low Voltage VIL - VSS - 0.3 VDD V Input High Voltage VIH - 0.7 VDD - VDD V MFP Output Low Voltage VML IOL = 2.7 mA - - 0.4 V MFP Output High Voltage VMH IOH = -3.5 mA 2.4 - - V Port RA, RB Output Low Voltage VABL IOL = 2.0 mA - - 0.4 V Port RA, RB Output high Voltage VABH IOH = -2.0 mA 2.4 - - V LCD Supply Current ILCD All Seg. On - - 10 A SEG0-SEG23 Sink Current (work as LCD output pins) IOL VOL = 0.4V VLCD = 0.0V 0.4 - - A SEG0-SEG23 Drive Current (work as LCD output pins) IOH VOH = 2.4V VLCD = 3.0V -0.3 - - A -7- Publication Release Date: April 14, 2005 Revision A6 W541C250 DC Characteristics, continued PARAMETER SYM. SEG0-SEG23 Output Low Voltage (work as DC output pins) VSL SEG0-SEG23 Output High Voltage (work as DC output pins) CONDITIONS MIN. TYP. MAX. UNIT IOL = 0.6 mA - - 0.4 V VSH IOH = -0.3 A 2.4 - - V Port RE Sink Current IEL VOL = 0.9V 7.5 - - mA Port RE Source Current IEH VOH = 2.4V -0.4 -1.2 - mA Pull-up Resistor RCD Port RC, RD 100 350 1000 K INT Pull-up Resistor RINT - 50 250 1000 K RES Pull-up Resistor RRES - 20 100 500 K 6.3 AC Characteristics (VDD-VSS = 3V, TA = 25 C; unless otherwise specified) PARAMETER Op. Frequency Instruction Cycle Time SYM. FOSC CONDITIONS MIN. TYP. MAX. RC type - - 4000 Crystal type 1 (Option low-speed type) - 32.768 - Crystal type 2 (Option high-speed type) 400 - 3580 UNIT KHz TI One machine cycle - 4/FOSC - mS Reset Active Width TRAW FOSC = 32.768 KHz 1 - - S Interrupt Active Width TIAW FOSC = 32.768 KHz 1 - - S -8- W541C250 7. APPLICATION CIRCUIT Vcc VDD RA0 COM0 RA3 COM3 Output Signal SEG0 RB0 RB1 RB2 RB3 LCD PANEL (1/3 Bias 1/4 Duty) SEG23 DH1 RC0 RC1 RC2 RC3 DH2 VDD1 VDD2 VDD3 RD0 RD1 RD2 RD3 Connect to capacitor and VDD to generate LCD voltage Vcc INT RES RE0 RE1 XOUT RE2 RE3 Vcc or MFP XIN VSS *1(option) Note : *1 is for accuracy -9- Publication Release Date: April 14, 2005 Revision A6 W541C250 8. REVISION HISTORY VERSION DATE DESCRIPTION A2 _ A3 _ A4 _ A5 May 29, 2003 A6 April 14, 2005 * Add Important Notice * Note: Xin/Xout had been built-in 20 pF capacitior. * Delete XOUT capacitor from application circuit Note: Update Hi freq range from 2MHzo 3.58MHz (C250) * Note: RC is built-in schmitt trigger * Note: Do not be floating when it is as input or output open-drain (NMOS type) Important Notice Winbond products are not designed, intended, authorized or warranted for use as components in systems or equipment intended for surgical implantation, atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, or for other applications intended to support or sustain life. Further more, Winbond products are not intended for applications wherein failure of Winbond products could result or lead to a situation wherein personal injury, death or severe property or environmental damage could occur. Winbond customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Winbond for any damages resulting from such improper use or sales. - 10 -