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Weltrend Semiconductor

WT5081 Datasheet Preview

WT5081 Datasheet

8-Bit uC

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eltrend
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DESCRIPTION
WT5081
8-bit µC with 4Mb ROM, 6.448Kbytes SRAM,
Push-Pull DAC and 48x32/64x32 LCD Driver
v1.11
The WT5081 is a high-performance, low-cost, CMOS 8-bit single-chip microcontroller with
48x32/64x32 dot-matrix LCD driver, which is suitable for variable applications, especially when
large number of LCD dots and large ROM space are needed, including edutainment toys, speech
synthesizer, Chinese character pagers, databank, handheld games and talking devices.
This chip has 8-bit CPU, RAM, I/Os, dual 16-bit timer/counters, interrupt controller, and a 9-bit
push-pull D/A output. To be suitable for portable battery-powered applications, a power saving
function is included. And, ESD protection circuitry is included to enhance the capability of ESD
resist.
FEATURES
u 8-bit single chip microcontroller with 48x32/64x32 LCD driver
u 6.448Kbytes SRAM and 512 Kbytes ROM
u Voltage operating range from 2.9 V to 3.2 V
u Built-in crystal OSC circuit and RC oscillator with maximum frequency up to 3.0 MHz
u 5 interrupt sources (external:1; internal:4) ; all sources have independent latches each and
multiple interrupt control is available
u I/O port (20 pins)
I/O port
4 pins
I/O port
16 pins
u Watchdog Timer
u Operating current 1mA/2MHz@3V; providing standby mode and key wake-up mode
u RC OSC OFF and 32.768KHz X’tal OSC ON: current consumption < 15 uA @3V
u Dual 16-bit timer/counters
u 9-bit push-pull D/A converter
u ESD protection circuitry
u Package: Chip form or 128-pin LQFP (14mm x 14mm x 1.4mm)




Weltrend Semiconductor

WT5081 Datasheet Preview

WT5081 Datasheet

8-Bit uC

No Preview Available !

eltrend
www.DataSheet4U.com
WT5081
8-bit µC with 4Mb ROM, 6.448Kbytes SRAM,
Push-Pull DAC and 48x32/64x32 LCD Driver
PIN FUNCTION (128-pin LQFP)
v1.11
PIN NAME
P20~ P23
NC
NC
NC
P10/SEG56~
P17/SEG63
P00/SEG48~
P04/SEG52
P05/SEG53~
P07/SEG55
XTLIN
XTLOUT
RIN
NRESET
NTEST
SPKA
SPKB
VDD
GND
EXTINT
SEG0~SEG2
SEG3~SEG40
SEG41~SEG47
COM0~COM31
VLCD
BIAS1
BIAS2
BIAS3
BIAS4
Ca
Cb
Cc
Cd
PIN#
113~ 110
104
105
106
125~
118
5~
1
128~
126
115
116
114
108
109
100
102
52,98,101
13,99,103,117
107
55~53
51~14
12~6
92~61
58
60
57
56
59
97
95
96
94
In/Out
I/O
-
-
-
I/O
I/O
FUNCTIONS
4-bit I/O port
Not connected
Not connected
Not connected
8-bit I/O port with latch
8-bit I/O port with latch
Input
Output
Input
Input
Input
Output
Output
Input
Input
Input
Output
Crystal input
Crystal output
ROSC input; connected to VDD through
a resistor
System reset signal input; low active
Test pin. “H”: Normal; “L”: Test
Current D/A output
Current D/A output
Power source
Ground
External interrupt input
LCD segment output
Output
Input
Output
Output
Output
Output
Output
Output
Output
Output
LCD common output
LCD voltage supply
LCD bias voltage output
LCD bias voltage output
LCD bias voltage output
LCD bias voltage output
LCD pumping capacitor
LCD pumping capacitor
LCD pumping capacitor
LCD pumping capacitor


Part Number WT5081
Description 8-Bit uC
Maker Weltrend Semiconductor
Total Page 3 Pages
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