GENERAL DESCRIPTION
EM73P361A is an advanced single chip CMOS 4-bit one-time programming (OTP) micro-controller. It contains 3K-byte OTP ROM, 52-nibble RAM, 4-bit ALU, 13-level subroutine nesting, 22-stage time base, two 12-bit timer/counters for the kernel function. EM73P361A also contains 5 interrupt sources, 1 input port, 4 bidirection I/O ports, built-in watch-dog-timer counter, tone generator and LCD driver (27x3 to 13x3).
Except low-power consumption and high speed, EM73P361A also have a sleep mode operation for power saving.

FEATURES
• Operation voltage : 2.4V to 3.6V(clock frequency : 32K Hz).
• Clock source : Single clock system for crystal, connect a external resistor or external clock source available by mask option.
• Instruction set : 109 powerful instructions.
• Instruction cycle time : 122µs for 32K Hz.
• OTP ROM capacity : 3072 x 8 bits.
• RAM capacity : 52 x 4 bits.
• Input port : 1 port (P0)(Pull-up and pull-down resistor with wakeup function available by mask option).
• Bidirection port : 4 ports (P4, P5, P6, P7) are available by mask option. (each I/O pin is push-pull and open-drain available by mask option) P4.0 is high current pin (P4.0 and TONE available by mask option). P4.2~P4.3, P5, P6 and P7 are shared with SEG26-SEG13 by mask option.
• 12-bit timer/counter : Two 12-bit timer/counters are programmable for timer mode.
• Low voltage reset (LVR) : Reset at 2.2V, and reset release at 2.4V.
• Tone generator : There is a built-in tone generator.
• Built-in time base counter : 22 stages.
• Subroutine nesting : Up to 13 levels.
• Interrupt : External . . . . . 2 External interrupt (INT0, INT1).
    Internal . . . . . . 2 Timer overflow interrupts. 1 Time base interrupt.
• LCD driver : 27 X 3 to 13 X 3 dots available by mask option. Capacitor divider and resistor divider are available by mask option.1/3, 1/2 and static three kinds of duty (1/2 bias) selectable. The programming method of LCD driver is I/O mapping.
• Built-in watch-dog-timer : The WDT is enabled or disabled by mask option.
• Power saving function : Sleep mode and Hold mode.
• Package type : EM73P361AH Chip form 47 pins. EM73P361AAQ QFP 100 pins.

APPLICATIONS
    EM73P361A is suitable for application in family appliance, consumer products, hand held games and the toy controller.