WT5082
Pager Controller with POCSAG Decoder12KB SRAM
296KB ROM and 56x32/56x33 LCD Driver
v.0.97
Weltrend Semiconductor Inc.
24 2 2F, No. 24, Industry East 9
th
Road,
Science-Based Industrial Park,
Hsin-chu, TAIWAN
1 Rev. 030190
eltrend
DESCRIPTION
The WT5082 is a high-performance, low-cost, CMOS 8-bit single-chip micro-controller with
POCSAG decoder12KB SRAM296KB ROM and 56x32/56x33 dot-matrix LCD driver
embedded, which is suitable for information paging applications, especially when large number of
LCD dots and large ROM and SRAM space are needed, such as Chinese character display pagers.
This chip has 8-bit CPU, RAM, ROM, I/Os, two timers/counters, interrupt controller, LCD driver
and watchdog timer. To be suitable for portable battery-powered applications, a power saving
function is included.
FEATURES
u
POCSAG pager code decoder
Single crystal support 512, 1200 and 2400 baud rates ( 76.8kHz crystal )
Support 6 RICs addresses and 6 independent frame numbers
Support partial address match facility for address F (up to 260k addresses are provided)
3 RF control lines (PLL, quick charge and enable)
Build in data filter (16-times over-sampling) and data bit clock recovery
Interrupt 6502 CPU when there are any status change
DMA or interrupt mode to send the received message data to CPU
u
8-bit single chip Microcontroller with 56x32/56x33 LCD driver
u
12Kbytes SRAM (~2K bits for LCD display SRAM), 256 Kbytes character pattern ROM,
32Kbytes program ROM and 8Kbytes ROM for test program
u
Wide voltage operating range from 2.5 V to 3.6 V
u
Built-in Ring Oscillator with maximum frequency up to 2.0 MHz
u
I/O port (21 pins)
Input port 8 pins
Input/output port 13 pins
u
Watchdog Timer
u
Operating current 1
mA/1MHz@3V; providing standby mode and key wake-up mode
Ring OSC OFF and 76.8KHz X'tal OSC ON: current consumption < 85
uA @3V
u
Dual timer/counters
WT5082
Pager Controller with POCSAG Decoder12KB SRAM
296KB ROM and 56x32/56x33 LCD Driver
v.0.97
Weltrend Semiconductor Inc.
24 2 2F, No. 24, Industry East 9
th
Road,
Science-Based Industrial Park,
Hsin-chu, TAIWAN
2 Rev. 030190
eltrend
u
7-bit EPI (external port interrupt) for key wake-up interrupt
u
1-bit EPI (external port interrupt to 6502 NMI) for battery remove detect
u
SIO for flex decoder (32bit)
u
UART(10 bits)
u
One PWM signal function
u
2.2V threshold automatic power on reset
u
2.0V low power reset
u
Package: Chip form or 128-pin LQFP (14mm x 14mm x 1.4mm)
WT5082
Pager Controller with POCSAG Decoder12KB SRAM
296KB ROM and 56x32/56x33 LCD Driver
v.0.97
Weltrend Semiconductor Inc.
24 2 2F, No. 24, Industry East 9
th
Road,
Science-Based Industrial Park,
Hsin-chu, TAIWAN
5 Rev. 030190
eltrend
PIN FUNCTION (128-pin LQFP)
PIN NAME
PIN#
In/Out
FUNCTIONS
COM1~COM15
1~15
Output
LCD common output
SEG0~SEG31
16~47
Output
LCD segment output
GND
48
P
Ground
VDD
49
P
Power Source
SEG32~SEG55
50~73
Output
LCD segment output
COM31~COM16
74~89
Output
LCD common output
COM32
90
Output
LCD common output (for
ICON
)
BIAS1~BIAS4
91~94
Output
LCD bias voltage output
V
LCD
95
Input
LCD voltage supply
Vpp
96
Output
V
RO
*2
Cb
97
Output
LCD pumping capacitor
Ca
98
Output
LCD pumping capacitor
P14_EPI4
99
Input
EPI4, Battery low detect
P15_EPI5
100
Input
EPI5, Battery remove detect
P20_LMP
101
I/O
General I/O or Lamp output
P21_SS
102
I/O
General I/O, SS output pin for Serial I/O
or UART serial output
P22
103
I/O
General I/O or PLL_LE
P23_ECS
104
I/O
General I/O for EEPROM CS
P24_ECK
105
I/O
General I/O for EEPROM CK
& PLL CK
P25_EDI
106
I/O
General I/O for EEPROM DI
& PLL DATA
P26_EDO
107
I/O
General I/O for EEPROM DO
P27_ RE2
108
I/O
RF control signal 2 output (RF enable)
or MISO input pin for Serial I/O
P06_RDY
109
I/O
General I/O or RDY input pin for Serial I/O;
EPI6 or UART Serial Input
P01_RE1
110
Output
RF control signal 1 output (quick charge)
or MOSI output pin for Serial I/O
P00_RE
111
Output
RF control signal output or SCK output pin for SIO
P04_ RFDI
112
Input
RF signal data input
P07
113
I/O
General I/O port , Input port for EPI7 or PWM
signal output
WT5082
Pager Controller with POCSAG Decoder12KB SRAM
296KB ROM and 56x32/56x33 LCD Driver
v.0.97
Weltrend Semiconductor Inc.
24 2 2F, No. 24, Industry East 9
th
Road,
Science-Based Industrial Park,
Hsin-chu, TAIWAN
6 Rev. 030190
eltrend
P10_EPI0~
P13_EPI3
114-117
Input
4-bit input port for External interrupt and general
input
RESETB
118
Input
System reset signal input; low active
GND
119
P
Ground
XIN
120
Input
Crystal input
XOUT
121
Output
Crystal output
VDD
122
P
Power source
ROSC
123
Input
Resistor for ring oscillator
P02_Ptimer0
124
I/O
General I/O port or output from ptimer0
P03_Ptimer1
125
I/O
General I/O port or output from ptimer1
768KO
126
Output
76.8KHz clock output for FLEX decoder
or PWM Enable control signal
TEST
127
Input
Test pin. High active
COM0
128
Output
LCD common output
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