GPL191B2

© Generalplus Technology Inc.

Proprietary & Confidential

3

Mar. 08, 2010

Version: 1.1

1024-dot LCD Controller/Driver

with 256KB ROM

1. GENERAL DESCRIPTION

The GPL191B2 is an 8-bit CMOS microprocessor containing 704

bytes working RAM, 256K bytes ROM, 12 I/Os, interrupt/wakeup

controller, UART for serial communication, and automatic display

controller/driver for LCD. It has one PWM driver with two audio

channel outputs.

Attractive sound effects can easily be

generated.

Its large ROM area can be used to store both

program and audio data (speech duration is approx. 80 seconds at

a 6KHz sampling rate using 4-bit ADPCM). The built-in UART

speeds up data transmission between two chips. Furthermore, a

SLEEP (power-down) feature is also built-in to reduce power

consumption. The GPL191B2 is designed with state-of-the-art

technology to fulfill LCD application requirements, especially

hand-held products.

2. FEATURES

Built-in 8-bit processor

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704 bytes SRAM

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256K bytes ROM

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Max. Operating Speed: 4.0MHz @ 2.4V

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CPU clock is software programmable, can be 1/2, 1/4, 1/8

or 1/16 R-oscillator clock frequency

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Key wake-up function

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Provides 8 interrupt sources

Asynchronous serial interface (UART)

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Supports bit rate up to 115.2 Kbps

Programmable LCD Driver

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Up to 64 segments, up to 16 commons, maximum

1024 dots

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1/4 or 1/5 bias capability

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1/8, 1/12 or 1/16 duty

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128 bytes dedicated LCD RAM

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Built-in voltage doubler and voltage regulator to generate

VLCD for LCD driver

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16-level VLCD adjustable

Power saving SLEEP mode (wakeup source: key input, 2Hz,

16Hz, and timer)

Low Voltage Detector

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2.6V and 2.4V detection

Wide Operating Voltage:

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2.4V - 3.6V

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3.6V - 5.5V

Peripherals

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12 I/O pins shared with LCD segments (mask option)

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4 I/O pins (IOEF3 - 0)

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Extra two general I/O pins (IOEF5 - 4) or 2 UART pins

(TXD - RXD) (mask option)

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Extra 2 I/O pins (IOEF7 - 6) if LCD is 1/8 or 1/12 duty

(mask option)

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Built-in 32.768KHz oscillator circuit for real time clock

Function

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Built-in R-oscillator (only one resistor required)

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Internal time base generator

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Two 16-bit reloadable timer/counters(TM0 & TM1)

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2-channel 8-bit audio decoders

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One PWM output

(can drive speaker or buzzer directly)

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Watchdog Timer for reliable operation

Low-power consumption

3. APPICATION FIELD

Hand held Games

Scientific Calculator

Talking Calculator, Talking Clock

Talking Instrument Controller

General Speech Synthesizer

Data Bank