EM73A89B
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
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limina
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GENERAL DESCRIPTION
EM73A89B is an advanced single chip CMOS 4-bit micro-controller. It contains 16K-byte ROM, 1012-nibble
RAM, 4-bit ALU, 13-level subroutine nesting, 22-stage time base, two 12-bit timer/counters for the kernel
function, and one high speed conter. EM73A89B also equipped with 6 interrupt sources, 3~7 I/O ports (including
1 input port and 2~7 bidirection ports), LCD display (64x16 or 64x32), built-in watch-dog-timer and speech
synthesizer.
It's 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
Clock source
: 2.2V to 3.6V.
: Dual clock system. Low-frequency oscillator is 32KHz. Crystal oscillator or RC
oscillator by mask option and high-frequency oscillator is a built-in internal
oscillator.
Instruction set
: 107 powerful instructions.
Instruction cycle time
: 0.85µs for 9.2M or 1.7µs for 4.6M Hz selected by mask option(high speed clock).
122µs for 32768 Hz (low speed clock, frequency double).
ROM capacity
: 16K x 8 bits.
RAM capacity
: 1012 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).
Bidirection port
: 2~7 ports (P1, P2, P4, P5, P6, P7, P8). IDLE/STOP release function for P8(0..
3) is available by mask option. P1, P2, P5, P6, P7 are shared with LCD pins.
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/HTC interrupt.
High speed counter
: The high speed counter includes one 8-bit high speed counter and a resistor to
frequency oscillator. It has resistor to frequrncy oscillation mode, melody mode
and auto load timer mode.
LCD driver
: 64x32 or 64x16 dots, 1/32 or 1/16 duty, 1/5 bias by mask option.
Speech synthesizer
: 992K speech data ROM (use as 992K nibbles data ROM).
PWM or current D/A
: Output selection by mask option.
Power saving function : SLOW, IDLE, STOP operation modes.
Package type
: Chip form 126 pins.
* This specification are subject to be changed without notice.
8.16.2001
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