EM73P461A

EM73P461A 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT inary Prelim GENERAL DESCRIPTION EM73P461A is an advanced single chip CMOS 4-bit one-time programming (OTP) micro-controller. It contains 4K/8K-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. EM73P461A also contains 6 interrupt sources, 1 input port, 2 bidirection ports, LCD display (32x4), and one high speed timer/counter with melody output. EM73P461A has plentiful operating modes (SLOW, IDLE, STOP) intended to reduce the power consumption. FEATURES Operation voltage Clock source : 2.4V to 3.6V. : 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 oscillator (connect an external resistor). Instruction set : 109 powerful instructions for 4K ROM / 107 powerful instructoins for 8K ROM. Instruction cycle time : Up to 2us for 4 MHz (high speed clock). 122 µs or 244µs by frequency double mask option for 32768 Hz (low speed clock). ROM capacity : 4096 X 8 bits / 8192 X 8 bits ROM are choosed by mask option. RAM capacity : 244 X 4 bits. Input port : 1 port (P0). P0(0..3) and IDLE releasing function are available by mask option. Bidirection port : 2 ports (P4, P8). P4.0 and SOUND is available by mask option. P4.1 is shared with HTC external input. P8(0..3) and IDLE releasing function are available by mask option. 12-bit timer/counte...