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| eltrend www..com WT5081 8-bit C with 4Mb ROM, 6.448Kbytes SRAM, Push-Pull DAC and 48x32/64x32 LCD Driver v1.11 DESCRIPTION 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 u u u u 8-bit single chip microcontroller with 48x32/64x32 LCD driver 6.448Kbytes SRAM and 512 Kbytes ROM Voltage operating range from 2.9 V to 3.2 V Built-in crystal OSC circuit and RC oscillator with maximum frequency up to 3.0 MHz 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) CI/O port 4 pins CI/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) eltrend www..com WT5081 8-bit C with 4Mb ROM, 6.448Kbytes SRAM, Push-Pull DAC and 48x32/64x32 LCD Driver v1.11 PIN FUNCTION (128-pin LQFP) 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 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 107 55~53 51~14 12~6 92~61 58 60 57 56 59 97 95 96 94 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 eltrend www..com WT5081 8-bit C with 4Mb ROM, 6.448Kbytes SRAM, Push-Pull DAC and 48x32/64x32 LCD Driver v1.11 Output High I (I/O: P1&P0) Output High I (I/O: P1&P0) Output High I (I/O: P1&P0) Output High I (I/O: P20~P23) Output Sink I*(u2) (I/O: P20~P23) ROSC Resistor CPU Clock Iol Ioh Iol Ioh Iol RIN FCPU 230 230 230 0.9 0.7 1.6M 0.03 3.0 u A VDD=3.0V, Vpp=3V Vol=0.3V u A VDD=3.0V, Vpp=7V Voh=2.7V u A VDD=3.0V, Vpp=9V Vol=0.3V mA VDD=3.0V Voh=2.7V mA VDD=3.0V Vol=0.3V FOSC=1.5MHz @3.0V MHz FCPU=FOSC @3.0V |
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