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| eltrend WT5082 Pager Controller with POCSAG DecoderB 12KB SRAMB 296KB ROM and 56x32/56x33 LCD Driver v.0.97 DESCRIPTION The WT5082 is a high-performance, low-cost, CMOS 8-bit single-chip micro-controller with POCSAG decoderB12KB SRAMB296KB 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) CInput port 8 pins CInput/output port 13 pins u Watchdog Timer u Operating current 1mA/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 eltrend WT5082 Pager Controller with POCSAG DecoderB 12KB SRAMB 296KB ROM and 56x32/56x33 LCD Driver v.0.97 u u u u u u u u 7-bit EPI (external port interrupt) for key wake-up interrupt 1-bit EPI (external port interrupt to 6502 NMI) for battery remove detect SIO for flex decoder (32bit) UART(10 bits) One PWM signal function 2.2V threshold automatic power on reset 2.0V low power reset Package: Chip form or 128-pin LQFP (14mm x 14mm x 1.4mm) eltrend WT5082 Pager Controller with POCSAG DecoderB 12KB SRAMB 296KB ROM and 56x32/56x33 LCD Driver v.0.97 PIN FUNCTION (128-pin LQFP) PIN NAME COM1~COM15 SEG0~SEG31 GND VDD SEG32~SEG55 COM31~COM16 COM32 BIAS1~BIAS4 VLCD Vpp Cb Ca P14_EPI4 P15_EPI5 P20_LMP P21_SS P22 P23_ECS P24_ECK P25_EDI P26_EDO P27_ RE2 P06_RDY P01_RE1 P00_RE P04_ RFDI P07 PIN# 1~15 16~47 48 49 50~73 74~89 90 91~94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 In/Out Output Output P P Output Output Output Output Input Output Output Output Input Input I/O I/O I/O I/O I/O I/O I/O I/O I/O Output Output Input I/O FUNCTIONS LCD common output LCD segment output Ground Power Source LCD segment output LCD common output LCD common output (for ICON) LCD bias voltage output LCD voltage supply VRO*2 LCD pumping capacitor LCD pumping capacitor EPI4, Battery low detect EPI5, Battery remove detect General I/O or Lamp output General I/O, SS output pin for Serial I/O or UART serial output General I/O or PLL_LE General I/O for EEPROM CS General I/O for EEPROM CK & PLL CK General I/O for EEPROM DI & PLL DATA General I/O for EEPROM DO RF control signal 2 output (RF enable) or MISO input pin for Serial I/O General I/O or RDY input pin for Serial I/O; EPI6 or UART Serial Input RF control signal 1 output (quick charge) or MOSI output pin for Serial I/O RF control signal output or SCK output pin for SIO RF signal data input General I/O port , Input port for EPI7 or PWM signal output eltrend WT5082 Pager Controller with POCSAG DecoderB 12KB SRAMB 296KB ROM and 56x32/56x33 LCD Driver v.0.97 P10_EPI0~ P13_EPI3 RESETB GND XIN XOUT VDD ROSC P02_Ptimer0 P03_Ptimer1 768KO TEST COM0 114-117 118 119 120 121 122 123 124 125 126 127 128 Input Input P Input Output P Input I/O I/O Output Input Output 4-bit input port for External interrupt and general input System reset signal input; low active Ground Crystal input Crystal output Power source Resistor for ring oscillator General I/O port or output from ptimer0 General I/O port or output from ptimer1 76.8KHz clock output for FLEX decoder or PWM Enable control signal Test pin. High active LCD common output |
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