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W541C250 Data Sheet 4-BIT MICROCONTROLLER
Table of Contents1. 2. 3. 4. 5. 6. GENERAL DESCRIPTION ......................................................................................................... 2 FEATURES ................................................................................................................................. 2 BLOCK DIAGRAM ...................................................................................................................... 4 PIN CONFIGURATION ............................................................................................................... 5 PIN DESCRIPTION..................................................................................................................... 6 ELECTRICAL CHARACTERISTICS ........................................................................................... 7 6.1 6.2 6.3 7. 8. Absolute Maximum Ratings........................................................................................... 7 DC Characteristics ........................................................................................................ 7 AC Characteristics......................................................................................................... 8
APPLICATION CIRCUIT............................................................................................................. 9 REVISION HISTORY ................................................................................................................ 10
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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
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Publication Release Date: April 14, 2005 Revision A6
W541C250
3. BLOCK DIAGRAM
SEG0 to SEG23 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 ALU PORT RB RB0 to 3
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
MUX
MFP
VDD Watchdog Timer (4 Bit) Divider 0 (14 Bit) VSS Timing Generator INT RES
XIN
XOUT
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W541C250
4. PIN CONFIGURATION
VV X DDDD RM/ / XOV IR AF NE I UDNNHHDD 0PTSNTDCC1212
SSS VEEE DGGG D222
S E G 2
S E G 1
332109
51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 RA1 RA2 RA3 RB0 RB1 RB2 RB3 RC0 RC1 RC2 RC3 RD0 RD1 52 53 54 55 56 57 58 59 60 61 62 63 64 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 32 31 30 29 28 27 26 25 24 23 22 21 20 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 SEG9 SEG8 SEG7 SEG6
RRRRRRVNNCCCCSSSSSS DDEEEESCCOOOOEEEEEE 230123S MMMMGGGGGG 3210012345
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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. Connected to crystal or resistor to generate system clock by code option. 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. And build-in schmitt trigger 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). External interrupt pin with pull-high resistor. 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 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
XOUT
O
RA0-RA3 RB0-RB3 RC0-RC3 RD0-RD3 RE0-RE3
I/O I/O I I O
MFP
INT
RES
O I I O
SEG0-SEG23
COM0-COM3
O
COM1 COM2 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 (-).
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W541C250
6. ELECTRICAL CHARACTERISTICS
6.1 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.
6.2 DC Characteristics
(VDD-VSS = 3.0V, FOSC. = 32.768 KHz, TA = 25 C; unless otherwise specified)
PARAMETER
Op. Voltage Op. Current (Crystal type) Op. Current (RC type) Hold Current (Crystal type) Hold Current (RC type) Stop Current (Crystal type) Stop Current (RC type) Input Low Voltage 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-SEG23 Sink Current (work as LCD output pins) SEG0-SEG23 Drive Current (work as LCD output pins)
SYM.
VDD IOP1 IOP2 IHM1 IHM2 ISM1 ISM2 VIL VIH VML VMH VABL VABH ILCD IOL IOH
CONDITIONS
No load (Ext-V) No load (Ext-V) Hold mode No load (Ext-V) Hold mode No load (Ext-V) Stop mode No load (Ext-V) Stop mode No load (Ext-V) IOL = 2.7 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
MIN.
2.4 VSS 0.7 VDD 2.4 2.4 0.4 -0.3
TYP.
8 35 4 16 0.1 0.1 -
MAX.
5.5 20 65 6 40 2 2 0.3 VDD VDD 0.4 0.4 10 -
UNIT
V
A A A A A A
V V V V V V
A A A
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Publication Release Date: April 14, 2005 Revision A6
W541C250
DC Characteristics, continued
PARAMETER
SEG0-SEG23 Output Low Voltage (work as DC output pins) SEG0-SEG23 Output High Voltage (work as DC output pins) Port RE Sink Current Port RE Source Current Pull-up Resistor INT Pull-up Resistor
RES Pull-up Resistor
SYM.
VSL VSH IEL IEH RCD RINT RRES
CONDITIONS
IOL = 0.6 mA IOH = -0.3 A VOL = 0.9V VOH = 2.4V Port RC, RD -
MIN.
2.4 7.5 -0.4 100 50 20
TYP.
-1.2 350 250 100
MAX.
0.4 1000 1000 500
UNIT
V V mA mA K K K
6.3 AC Characteristics
(VDD-VSS = 3V, TA = 25 C; unless otherwise specified)
PARAMETER
SYM.
CONDITIONS
RC type Crystal type 1 (Option low-speed type) Crystal type 2 (Option high-speed type)
MIN.
400 1 1
TYP.
32.768 4/FOSC -
MAX.
4000 3580 -
UNIT
Op. Frequency
FOSC
KHz
Instruction Cycle Time Reset Active Width Interrupt Active Width
TI TRAW TIAW
One machine cycle FOSC = 32.768 KHz FOSC = 32.768 KHz
mS
S S
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W541C250
7. APPLICATION CIRCUIT
Vcc
VDD RA0 Output Signal RA3 RB0 RB1 RB2 RB3 RC0 RC1 RC2 RC3 COM3 SEG0 SEG23 DH1 DH2 VDD1 VDD2 VDD3 Connect to capacitor and VDD to generate LCD voltage Vcc COM0 LCD PANEL (1/3 Bias 1/4 Duty)
RD0 RD1 RD2 RD3
INT RES XOUT or XIN VSS *1(option)
RE0 RE1 RE2 RE3 MFP Vcc
Note :
*1 is for accuracy
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Publication Release Date: April 14, 2005 Revision A6
W541C250
8. REVISION HISTORY
VERSION
A2 A3 A4 A5 A6
DATE
_ _ _ May 29, 2003
DESCRIPTION * 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)
April 14, 2005 * Add Important Notice
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.
Headquarters
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Winbond Electronics Corporation America
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Please note that all data and specifications are subject to change without notice. All the trade marks of products and companies mentioned in this data sheet belong to their respective owners.
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