EM73A89B - ELAN Microelectronics Corp

EM73A89B 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

EM73A89B is an advanced single chip CMOS 4-bit micro-controller. It contains 16K-byte ROM, 1012-nibble RAM, 4-bit ALU, 13-level subroutine nesting, 22-stage time base, two 12-bit timer/counters for the kernel function, and one high speed conter. EM73A89B also equipped with 6 interrupt sources, 3~7 I/O ports (including 1 input port and 2~7 bidirection ports),.

Features

• Operation voltage • Clock source • • • • • • • • • • • • • • • • • : 2.2V to 3.6V. : Dual clock system. Low-frequency oscillator is 32KHz. Crystal oscillator or RC oscillator by mask option and high-frequency oscillator is a built-in internal oscillator. Instruction set : 107 powerful instructions. Instruction cycle time : 0.85µs for 9.2M or 1.7µs for 4.6M Hz selected by mask option(high speed clock). 122µs for 32768 Hz (low speed clock, frequency double). ROM capacity : 16K x 8 bits. RAM capacity : 1012 x 4 bits. Input port : 1 port (P0.0-P0.3), IDLE/STOP releasing function is available by .