W742E Просмотр технического описания (PDF) - Winbond

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W742E

4-BIT MICROCONTROLLER

Winbond 

W742E/C811

1. GENERAL DESCRIPTION

The W742E/C811 (W742C811 is mask type, W742E811 is electrical erasable EPROM type) is a high-

performance 4-bit microcontroller (µC) that built in 640-dot LCD driver. The device contains a 4-bit

ALU, two 8-bit timers, two dividers in dual-clock operation, a 40 × 16 LCD driver, ten 4-bit I/O ports

(including 2 output port for LED driving), multiple frequency output, and one channel DTMF generator.

There are also eleven interrupt sources and 16-level stack buffer. The W742E/C811 operates on very

low current and has three power reduction modes, hold mode, stop mode and slow mode, which help

to minimize power dissipation.

2. FEATURES

• Operating Voltage

− 2.4V – 5.5V for mask type

− 2.4V – 4.8V for electrical erasable EPROM type

• Dual-clock Operation

• Main Oscillator

− 3.58 MHz or 400 KHz can be selected by code option

− Crystal or RC oscillator can be selected by code option

• Sub-oscillator

− Connect to 32.768 KHz crystal only

• Memory

− 16384(16K) x 16 bit program ROM (including 64K x 4 bit look-up table)

− 5120(5K) x 4 bit data RAM (including 16 nibbles x 16 pages working registers)

− 40 x 16 LCD data RAM

• 40 Input/Output Pins

− Port for input only: 3 ports/12 pins

− Input/output ports: 3 ports/12 pins

− High sink current output port for LED driving: 2 port /8 pins

− DC output port: 2 ports/ 8 pins (selected by code option)

• Power-down Mode

− Hold mode: no operation (main oscillator and sub-oscillator still operate)

− Stop mode: no operation (main oscillator and sub-oscillator are stopped)

− Slow mode: main oscillator is stopped, system is operated by the sub-oscillator (32.768 KHz)

Publication Release Date: December 2000

-3-

Revision A1

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