EM73469A 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
inary Prelim
GENERAL DESCRIPTION
EM73469A is an advanced single chip
CMOS 4-bit micro-controller.
It contains 4K-byte ROM, 244-nibble RAM, 4-bit ALU, 13-level subroutine nesting, 22-stage time base, two 12-bit timer/counters for the kernel function.
EM73469A also contains 6 interrupt sources, 1 input port, 2 bidirection ports, LCD display (32x4), and one high speed timer/counter with melody output.
EM73469A has plentiful operating modes (SLOW, IDLE, STOP) intended to reduce the power consumption.
FEATURES
• Operation
voltage • Clock source : 1.
2V to 1.
8V.
: Dual clock system.
Low-frequency oscillator is Crystal or RC oscillator (32K Hz, conne...