EM73983
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
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GENERAL DESCRIPTION
EM73983 is an advanced single chip CMOS 4-bit micro-controller. It contains 16K-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. EM73983 also equipped with 6 interrupt sources, 3 I/O ports (including 1 input port and 2 bidirection
ports), LCD display (40x8), built-in sound generator and speech synthesizer.
It's low power consumption and high speedfeature are further strengten with DUAL, SLOW, IDLE and STOP
operation mode for optimized power saving.
FEATURES
• Operation voltage
• Clock source
: 2.2V to 4.8V.
: Dual clock system. Low-frequency oscillator is Crystal or RC oscillator (32K Hz,
connect a external resistor) by mask option and high-frequency oscillator is a
built-in internal oscillator (4.6 MHz).
Instruction set
: 107 powerful instructions.
Instruction cycle time
: 1.7µs for 4.6M Hz (high speed clock) .
244µs for 32768 Hz (low speed clock).
ROM capacity
: 16K x 8 bits.
RAM capacity
: 500 x 4 bits.
Input port
: 1 port (P0.0-P0.3), IDLE/STOP releasing function is available by mask
option. (each input pin has a pull-up and pull-down resistor available by mask
option).
Bidrection port
: 2 ports (P4, P8). IDLE/STOP release function for P8(0..3) is available by mask
option.
Built-in watch-dog-timer counter : It 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.
Subroutine nesting
: Up to 13 levels.
Interrupt
: External interrupt . . . . . . 2 input interrupt sources.
Internal interrupt . . . . . . 2 timer overflow interrupts, 1 time base interrupt.
1 speech interrupt.
LCD driver
: 40x8 dots,1 /8 duty, 1/5 bias with voltage multiplier.
Sound effect
: Tone generator and random generator.
Speech synthesizer
: 160K speech data ROM (use as 160K nibbles data ROM).
Power saving function
: SLOW, IDLE, STOP operation modes.
Package type
: Chip form 77 pins.
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* This specification are subject to be changed without notice.
10.31.2000
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