Description
4-BIT MICROCONTROLLER
The W742E81A/W742C81A is a high-performance 4-bit microcontroller (µC) that provides an LCD driver.The device contains a 4-bit ALU, two 8-bit timers, two dividers (for two oscillators) in dual-
clock operation, a 40 × 4 LCD driver, six 4-bit I/O ports (including 1 output port for LED driving), and one channel DTMF generator.There are also five interrupt sources and 16-levels subroutine nesting for interrupt applications.The W742E81A/W742C81A operates on very low curren
Features
- Operating voltage: 2.4V.
- 3.8V.
- Dual-clock operation or single-clock operation (By option).
- Main-oscillator.
- Connect to 3.58 MHz crystal or 400 KHz that can be selected by option code.
- Crystal or RC oscillator can be selected by code option (W742E81A).
- Connect to 2 MHz typical RC.
W742E81A-Winbond.pdf
