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| PRELIMINARY W541C260 4-BIT MICROCONTROLLER GENERAL DESCRIPTION The W541C260 is cost down version of W741C260 and all function are same as W741C260. It is a high-performance 4-bit microcontroller (C) with an LCD driver. The device contains a 4-bit ALU, two 8-bit timers, two dividers, a 32 x 4 LCD driver, and five 4-bit I/O ports (including 1 output port to drive the LEDs). There are also five interrupt sources and 8-level subroutine nesting for interrupt applications. The W541C260 has one power reduction mode to help minimize power dissipation. The W541C260 has two oscillator circuits and can work in dual-clock or single-clock operation mode. It is suitable for remote controllers, watches and clocks, speech synthesis LSI controllers, and other products. FEATURES * Operating voltage: 2.4V-5.5V (LCD drive voltage: 3.0V, or 4.5V) * Single or Dual Clock Mode - Single (main oscillator only) or dual clock (both main and sub-oscilator) by mask option . -Sub-oscillator is only 32.768 KHz crystal for dual clock mode. - Main oscillator is crystal or RC oscillation by mask code option . - Main clock : High-frequency clock (400 KHz to 4 MHz) or low-frequency clock (32.768 KHz) is selected 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) -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 -Port for output only: 1 port /4 pins (high sink current to drive LEDs) -MFP output pin: 1 pin (MFP) * Power-down mode - Hold function: no operation (except for oscillator) - Stop function: no operation (including main clock) * Five types of interrupts -Four internal interrupts (Divider 0, Divider 1, Timer 0, Timer 1) -One external interrupt (Port RC) -1- Publication Release Date: July 2002 Revision A2 W541C260 * 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 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 * Two built-in 14-bit clock frequency divider circuit (divider 0 and divider 1) * 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: 115 instructions * 8-level subroutine (include interrupt) nesting * Up to 1 S instruction cycle (with 4 MHz operating frequency) * Packaged in 80-pin QFP -2- Publication Release Date: July 2002 Revision A2 W541C260 BLOCK DIAGRAM SEG0 to SEG31 COM0 to COM3 VDD1 to 3 DH1 to 2 RAM (128*4) LCD DRIVER PORT RA ROM (2048*16) (look_up table 2K*4) +1(+2) RA0 to 3 ACC PORT RB RB0 to 3 ALU PORT RD PC Central Control Unit STACK (8 Levels) IEF HCF PSR0 HEF EVF PR PEF SEF MR1 RD0 to 3 PORT RC RC0 to 3 PORT RE RE0 to 3 . . . Timer 0 (8 Bit) Timer 1 (8 Bit) Modulation Frequency Pulse SEL MUL MFP Watch Dog Timer (4 Bit) Divider 0 Divider 1 (14 Bit) VDD Timing Generator VSS RES XIN1 XOUT1 XIN2 XOUT2 -3- Publication Release Date: July 2002 Revision A2 W541C260 PIN CONFIGURATION SSSS VVVEEEE / RRM IU IU V DDDDDGGGG R AAFNE NNTNDNNTNNHHDDD3 3 2 2 1 0 PCS C1 1 CDC2 2 CC1 2 1 2 3 1 0 9 8 X XO X XO 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 NNRRVNNC CCEESCCO 23S M 3 C O M 2 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 -4- Publication Release Date: July 2002 Revision A2 W541C260 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 15~20pF 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 a 32.768 KHz crystal. External 15~20pF capacitor uses to get accurate freq in crystal mode. Output pin for sub-oscillator. Connected to a 32.768 KHz crystal. 20PF capacitor is built in internal for crystal mode. 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. LCD segment output pins. Can also be used as DC output ports specified by code option. 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-RA3 RB0-RB3 RC0-RC3 RD0-RD3 RE0-RE3 I O I/O I/O I I O MFP RES O I O O SEG0-SEG31 COM0-COM3 The LCD alternating frequency can be selected by code option. DH1, DH2 VDD1, VDD2 VDD3 VDD VSS I I I I Connection terminals for voltage doubler (halver) capacitor. Positive (+) supply voltage terminal. Refer to Functional Description. Positive power supply (+). Negative power supply (-). -5- Publication Release Date: July 2002 Revision A2 W541C260 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 MIN. 2.4 - TYP. 0.6 MAX. 5.5 2.5 UNIT V mA Op. Current (RC Type) IOP2 No load (Ext-V) In dual-clock normal operation 1 4 mA Op. Current (Crystal Type) IOP3 No load (Ext-V) In dual-clock slow operation and Fm is stopped 8.5 20 A Hold Current (Crystal Type) IHM1 Hold mode No load (Ext-V) In dual-clock normal operation 280 450 A Hold Current (RC Type) IHM2 Hold mode No load (Ext-V) In dual-clock normal operation 500 600 A Hold Current (Crystal Type) IHM3 Hold mode No load (Ext-V) In dual-clock slow operation and Fm is stopped 4.0 6 A Stop Current (Crystal) Input Low Voltage Input High Voltage ISM VIL VIH Stop mode No load (Ext-V) In single-clock operating - VSS 0.7 VDD 0.1 - 2 0.3 VDD VDD A V V -6- Publication Release Date: July 2002 Revision A2 W541C260 MFP Output Low Voltage MFP Output High Voltage VML VMH IOL = 2.7 mA IOH = 3.5 mA 2.4 0.4 V V DC Characteristics, continue PARAMETER 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 Pull-up Resistor RES Pull-up Resistor IEL IEH RCD RRES VOL = 0.9V VOH = 2.4V Port RC, RD 7.5 0.4 100 20 1.2 350 100 1000 500 mA mA K K VSH IOH = 3 A 2.4 V VSL IOL = 0.6 mA 0.4 V SYM. VABL VABH ILCD IOL1 IOH1 CONDITIONS IOL = 2.0 mA IOH = 2.0 mA All Seg. ON VOL = 0.4V VLCD = 0.0V VOH = 2.4V VLCD = 3.0V MIN. 2.4 0.4 0.3 TYP. MAX. 0.4 6 UNIT V V A A A AC CHARACTERISTICS (VDD-VSS = 3.0V, Fm = 4 MHz, Fs = 32.768 KHz, TA = 25 C, LCD on; unless otherwise specified) PARAMETER SYM. CONDITIONS RC type MIN. 400 - TYP. 4000 32.768 - MAX. 4190 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 Instruction Cycle Time f f TI f(3V) - f(2.4V) f(3V) One machine cycle % - 4/FOSC - S -7- Publication Release Date: July 2002 Revision A2 W541C260 Reset Active Width Interrupt Active Width TRAW TIAW FOSC = 32.768 KHz FOSC = 32.768 KHz 1 1 S S -8- Publication Release Date: July 2002 Revision A2 W541C260 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 OOUT2 32.768 KHz RE0 RE1 RE2 RE3 MFP Vcc XIN2 *1 (option) VSS 470 0.1 uF Note: *1 is for accuracy -9- Publication Release Date: July 2002 Revision A2 |
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