W541L480 DATA SHEET
4BIT MICROCONTROLLER, 4K ×16 ROM, 256 ×4 RAM 128 -DOT LCD
Publication Release Date: June 8, 2007
- 1 - Revision A1
Table of Contents-
1. INTRODUCTION......................................................................................................................... 2
2. FEATURES................................................................................................................................. 3
3. ARCHITECTURE........................................................................................................................ 5
3.1 BLOCK DIAGRAM.......................................................................................................... 5
3.2 PIN CONFIGURATION................................................................................................... 6
3.3 PAD DESCRIPTION....................................................................................................... 7
4. ABSOLUTE MAXIMUM RATINGS ............................................................................................. 8
5. DC CHARACTERISTICS............................................................................................................ 9
6. AC CHARACTERISTICS.......................................................................................................... 11
7. TYPICAL APPLICATION CIRCUIT........................................................................................... 12
8. PACKAGE DIMENSION ........................................................................................................... 13
9. VERSION HISTORY................................................................................................................. 14
W541L480 DATA SHEET
- 2 -
1. INTRODUCTION
The W541L480 are high-performance 4-bit microcontroller (μC) with an LCD driver and mask ROM for
the program memory. The device contains a 4-bit ALU, two 8-bit timers, two dividers, a 32 × 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 W541L480 have two power
reduction modes, hold mode and stop mode, which help to minimize power dissipation.
The W541L480 have 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, hand-held
games and other products.
W541L480 DATA SHEET
Publication Release Date: June 8, 2007
- 3 - Revision A1
2. FEATURES
• Operating voltage: 1.2V to 3.6V (LCD drive voltage: 3.0V or 4.5V)
• Operating frequency
4MHz: 1.5V~3.6V
1MHz: 1.2V~3.6V
• Single or Dual Clock Mode
− Single (main oscillator only) or dual clock (both main and sub-oscilator) by mask option .
− Dual-clock slow operation mode: system is operated by the sub-oscillator
(FOSC = Fs and Fm is stopped)
− 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
− 4096 × 16 bit program ROM (including 4K × 4 bit look-up table)
− 256 × 4 bit data RAM (including 16 working registers)
− 32 × 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
• Five types of interrupts
− Four internal interrupts (Divider 0, Divider 1, Timer 0, Timer 1)
− One external interrupt (Port RC)
• LCD driver output
− 32 segment × 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)
W541L480 DATA SHEET
- 4 -
• 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 three internal clock frequencies (FOSC or
FOSC/64,Fs) 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: 125 instructions
• 8-level subroutine (include interrupt) nesting
• Up to 1 μS instruction cycle (with 4 MHz operating frequency)
• Packaged in 80-pin QFP
W541L480 DATA SHEET
Publication Release Date: June 8, 2007
- 5 - Revision A1
3. ARCHITECTURE
3.1 BLOCK DIAGRAM
W541L480 DATA SHEET
- 6 -
3.2 PIN CONFIGURATION
W541L480 DATA SHEET
Publication Release Date: June 8, 2007
- 7 - Revision A1
3.3 PAD DESCRIPTION
SYMBOL I/O FUNCTION
XIN1 I
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.
XOUT1 O
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.
XIN2 I
Input pin for sub-oscillator. Connected to a 32.768 KHz crystal. External 15~20pF
capacitor uses to get accurate freq in crystal mode..
XOUT2 O
oscillator. Connected Output pin for sub to a 32.768 KHz crystal. 20PF capacitor is
built in internal for crystal mode.
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.
RD0 −RD3 I 4-bit port for input only.
RE0 −RE3 O Output port only.
This port provides high sink current to drive LEDs.
MFP O
Output pin only.
This pin can output modulating or nonmodulating frequency, or Timer 1 clock
output specified by mode register 1 (MR1).
RES I System reset pin with pull-high resistor.
SEG0−SEG31 O LCD segment output pins.
Can also be used as DC output ports specified by code option.
O
COM0−COM3
LCD common signal output pins.
Static
COM0
COM1
COM2
COM3
Used
Not Used
1/2 Duty
Not Used
Not Used
Not Used
Not Used
1/3 Duty
Not Used
1/4 Duty
Used
Used
Used
Used
Used
Used
Used
Used
Used
The LCD alternating frequency can be selected by code option.
DH1, DH2 I Connection terminals for voltage doubler (halver) capacitor.
VDD1, VDD2,
VDD3 I Positive (+) supply voltage terminal.
Refer to Functional Description.
VDD I Positive power supply (+).
VSS I Negative power supply (-).
W541L480 DATA SHEET
- 8 -
4. ABSOLUTE MAXIMUM RATINGS
PARAMETER RATING UNIT
Supply Voltage to Ground Potential -0.3 to +7.0 V
Applied Input/Output Voltage -0.3 to +7.0 V
Power Dissipation 120 mW
Ambient Operating Temperature 0 to +70 °C
Storage Temperature -55 to +150 °C
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability
of the device.
W541L480 DATA SHEET
Publication Release Date: June 8, 2007
- 9 - Revision A1
5. DC CHARACTERISTICS
(VDD−VSS = 1.5V, Fm = 1 MHz, Fs = 32.768 KHz, TA = 25° C, LCD on, no load; unless otherwise specified)
PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT
Crystal mode - 50 200
Normal
operation RC mode - 100 400 μA
Operation current IOP Slow operation(LCD off) - 3 8 μA
Hold current IHM Slow operation - 2.5 5.0 μA
Stop current ISM Stop mode - 0.1 1 μA
(VDD−VSS = 3.0V, Fm = 4 MHz, Fs = 32.768 KHz, TA = 25° C, LCD on, no load; unless otherwise specified)
PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT
Crystal mode - 450 900
Normal
operation RC mode - 1900 3800 μA
Operation current IOP Slow operation(LCD off) - 8.5 20 μA
Hold current IHM Slow operation - 5 10 μA
Stop current ISM Stop mode - 0.1 1 μA
(VDD−VSS = 1.5V, FOSC. = 1 MHz, TA = 25° C; unless otherwise specified)
PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT
Op. Voltage VDD - 1.2 - 3.6 V
Input Low Voltage VIL - VSS -
0.3
VDD V
Input High Voltage VIH - 0.7 VDD - VDD V
MFP Output Sink Current
(VDD=1.5V) IML VOL = 0.4 V 3 5 - mA
MFP Output Source Current
(VDD=1.5V) IMH VOH = 1.0 V 3 5 - mA
MFP Output Sink Current
(VDD=3V) IML VOL = 0.4 V 6 8 - mA
MFP Output Source Current
(VDD=3V) IMH VOH = 2.4 V 6 10 - mA
Port RA, RB Output Low Voltage VABL IOL = 1.0 mA - 0.1 0.3 V
Port RA, RB Output High Voltage VABH IOH = 0.5 mA 1.2 1.4 - V
LCD Supply Current ILCD All Seg. ON - 1 6 μA
W541L480 DATA SHEET
- 10 -
Continued
PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT
SEG0−SEG31 Sink Current
(Used as LCD Output) IOL1 VOL = 0.4V
VLCD = 0.0V 90 - -
μA
SEG0−SEG31 Drive Current
(Used as LCD Output) IOH1 VOH = 1.2V
VLCD = 1.5V 1.5 - - μA
Segment Output Low Voltage
(Used as DC Output) VSL IOL = 150 μA - 0.1 0.15 V
Segment Output High Voltage
(Used as DC Output) VSH IOH = 1 μA 1.35 1.4 - V
Port RE Sink Current IEL VOL = 0.3V 2 3.5 - mA
Port RE Source Current IEH VOH = 1.2V 0.35 0.45 - mA
Port RE Sink Current(VDD=3.0V) IEL VOL = 0.9V 2 22 - mA
Port RE Source
Current(VDD=3.0V) IEH VOH = 2.4V 0.35 3 - mA
Port RC, RD Input Pull-up
Resistor RCD - 350 -
KΩ
RES Pull-up Resistor RRES - - 150 -
KΩ
W541L480 DATA SHEET
Publication Release Date: June 8, 2007
- 11 - Revision A1
6. AC CHARACTERISTICS
(VDD−VSS = 1.5V, TA = 25° C, unless otherwise specified)
PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT
RC type - - 4000
Crystal type 1 (Low speed) - 32.768 -
Op. Frequency FOSC
Crystal type 2 (High speed) - 4000
KHz
Frequency Deviation by
Voltage Drop for RC
Oscillator(32K)
Δf
f f(1.8V)
f(1.5V) -f(1.8V) - - 10 %
Frequency Deviation by
Voltage Drop for RC
Oscillator(1M)
Δf
f f(3V)
f(2.4V) -f(3V) - - 10 %
Frequency Deviation by
Voltage Drop for RC
Oscillator(4M)
Δf
f f(3V)
f(2.4V) -f(3V) - - 15 %
Instruction Cycle Time TI One machine cycle - 4/Fosc - S
Reset Active Width TRAW1 Fosc = 32.768 KHz 1 - - μS
Interrupt Active Width TIAW Fosc = 32.768 KHz 1 - - μS
W541L480 DATA SHEET
- 12 -
7. TYPICAL APPLICATION CIRCUIT
MFP
RES
XOUT
XIN
DH1
DH2
RC2
RC3
RA0
RA3
Output Signal
RB0
RB1
RB2
COM0
COM3
RB3
RC0
RC1
SEG0
SEG31
RD0
RD1
RD2
RD3
LCD
PANEL
(1/3 Bias
1/4 Duty)
RE0
RE1
RE2
RE3
Connect to capacitor and VD
D
to generate LCD voltage
Vcc
Vcc
Vcc
VDD
VDD1
VDD2
VDD3
VSS
OSCOUT
OSCIN
32.768
KHz
0.1 uF
0.1 uF
470 Ω
0.1 uF
W541L480 DATA SHEET
Publication Release Date: June 8, 2007
- 13 - Revision A1
8. PACKAGE DIMENSION
80-Lead QFP
41
4025
24
65
1
80
2
1
A
H
D
D
eb
EHE
y
AA
Seating Plane L
L1
See Detail F
Detail F
c
64
0.10
0120
0.004
2.40
1.40
19.10
1.20
18.80
1.00
18.49
0.094 0.055
0.988
0.752
0.047
0.976
0.740
0.039
0.964
0.728
0.80
20.13
14.13
0.25
0.45
2.97
3.30
20.00
14.00
2.85
19.87
13.87
0.10
0.30
2.73
0.10
0.792
0.556
0.010
0.018
0.117
0.130
0.787
0.551
0.112
0.031
0.782
0.546
0.004
0.012
0.107
0.004
Symbol Min. Nom. Max. Max.
Nom.
Min.
Dimension in Inches Dimension in mm
A
b
c
D
e
HD
HE
L
y
A
A
L1
1
2
E
0.014
0.006 0.15
0.35
24.49 24.80 25.10
12
0.025 0.037
0.087 0.103
0.65 0.95
2.21 2.62
θ
θ
W541L480 DATA SHEET
- 14 -
9. VERSION HISTORY
VERSION DATE PAGE DESCRITION
A1 June 8, 2007 - Formal Release
Important Notice
Winbond products are not designed, intended, authorized or w arranted 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 w herein 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
ow n risk and agree to fully indemnify Winbond for any damages resulting from such improper
use or sales.
