EM73866 - ELAN Microelectronics Corp

EM73866 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

EM73866 is an advanced single chip CMOS 4-bit micro-controller. It contains 8K-byte ROM, 500-nibble RAM, 4-bit ALU, 13-level subroutine nesting, 22-stage time base, two 12-bit timer/counters for the kernel function. EM73866 also contains 6 interrupt sources, 2 input port, 7 bidirection ports, Max LCD display (32x4), built-in watch-dog-timer and high speed Ti.

Features

• Operation voltage • Clock source • • • • • • • • • • • • • • • : 2.2V ~ 6V. : Dual clock system. Low-frequency oscillator is Crystal or RC oscillator (32K Hz, connect an external resistor) by mask option and high-frequency oscillator is RC (Connect an external resistor) or Crystall oscillator. Instruction set : 107 powerful instructions. Instruction cycle time : Up to 2us for 4 MHz (high speed clock). 244 µs for 32768 Hz (low speed clock). 122 µs for 32768 Hz (low speed clock with frequency Double) ROM capacity : 8192 X 8 bits. RAM capacity : 500 X 4 bits. Input port : 2 ports (P0, P2), P0(0.