GENERAL DESCRIPTION

EM73362 is an advanced single chip CMOS 4-bit micro-controller. It contains 3K-byte ROM, 52-nibble RAM, 4-bit ALU, 13-level subroutine nesting, 22-stage time base, one 12-bit timer for the kernal function and one high speed counter. EM73362 also contains 5 interrupt sources, 1 input port, 4 bidirection ports, built-in watchdog-timer and LCD driver (27x3 to 15x3).

Except low-power consumption and high speed, EM73362 has the STOP mode and IDLE mode operation for power saving function.

FEATURES

• Operation voltage : 1.2V to 1.8V.(clock frequency : 32 K 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 : Up to 122µs for 32 K Hz.

• ROM capacity : 3072 x 8 bits.

• RAM capacity : 52 x 4 bits.

• Input port : 1 port (4-bit).

• Bidirection port : 4 ports (P4, P6, P7, P8) are available by mask option. P4 is a high current port.

(P4.0 and TONE available by mask option. P4.1~P4.3 are shared with the input/

output of RFO.) P6, P7 and P8 are shared with SEG15-SEG26.

• 12-bit timer : One 12-bit timer is programmable for timer.

• High speed counter : The high speed counter includes one 8-bit high speed counter, one 12-bit general

counter and a resistor frequency oscillator. It has resistor to frequency oscillation

mode, melody mode and auto load timer mode.

• Built-in time base counter: 22 stages.

• Subrountine nesting : Up to 13 levels.

• Interrupt : External interrupt . . . . . . 2 input interrupt sources.

Internal interrupt . . . . . . 2 timer overflow interrupts,

1 time base interrupt.

• LCD driver : 27x3 to 15x3 dots 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 RAM mapping.

• Built-in watch-dog-timer is available by mask option.

• Built-in low battery detector.

• Power saving function : STOP mode and IDLE mode.

• Package type : Chip form 49 pins.