W742E Datasheet, PDF (3/60 Pages) Winbond – 4 BIT MICROCONTROLLER

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