GENERAL DESCRIPTION
EM73C63 is an advanced single chip CMOS 4-bit micro-controller. It contains 32K-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. EM73C63 is also equipped with 5 interrupt sources, 3 I/O ports (including 1 input port and 2 bidirection ports), LCD display (40x16), built-in sound generator.
Its low power consumption and high speed feature are further strengten with DUAL, SLOW, IDLE and STOP operation mode for optimized power saving.

FEATURES
• Operation voltage : 2.4V to 5.5V.
• Clock source : Dual clock system. Low-frequency oscillator is Crystal or RC oscillator (32KHz, connect a external resistor) by mask option and high-frequency oscillator is RC oscillator (connect a external resistor and a capacitor).
External clock and internal clock is available by mask option.
• Oscillation frequency : 480K, 1M, 2M and 4M Hz are both available for high frequency clock by mask option.
• Instruction set : 107 powerful instructions.
• Instruction cycle time : Up to 2 µs for 4 MHz (high speed clock).
    244 µs for 32768 Hz (low speed clock).
• ROMcapacity : 32768 X 8 bits.
• RAMcapacity : 500 X 4 bits.
• Input port : 1 port (P0.0-P0.3), IDEL/STOP releasing function is available by mask option.(each input pin has a pull-up and pull-down resistor available by mask option).
• Bidirection port : 2 ports (P4, P8). P4.0 and SOUND are available by mask option. IDEL/STOP releasing function for P8(0..3) is available by mask option.
• 12-bit timer/counter : Two 12-bit timer/counters are programmable for timer, event counter and pulse width measurement mode.
• Built-in time base counter : 22 stages.
• Subroutinenesting : Up to 13 levels.
• Interrupt : External . .. . . . 2 input interrupt sources.
    Internal . . . . . . 2 Timer overflow interrupts.
                             1 Time base interrupt.
• LCD driver : 40 X 16 dots, 1/16 duty, 1/5 bias with voltage multiplier.
• Sound effect : Tone generator, random generator and volume control.
• Power saving function: SLOW, IDLE, STOP operation modes.
• Package type : Chip form 84 pins, PLCC 84 pins.