EM73880
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
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GENERAL DESCRIPTION
EM73880 is an advanced single chip CMOS 4-bit micro-controller. It contains 8K-byte ROM, 244-nibble RAM,
4-bit ALU, 13-level subroutine nesting, 22-stage time base, two 12-bit timer/counters for the kernel function.
EM73880 also contains 6 interrupt sources, 1 input port, 2 bidirection ports, LCD display (32x4), and one high
speed timer/counter,sound generator, and speech synthesizer.
EM73880 has plentiful operating modes (SLOW, IDLE, STOP) intended to reduce the power consumption.
FEATURES
• Operation voltage
• Clock source
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: 2.4V to 3.6V.
: Dual clock system. Low-frequency oscillator (32.768 KHz) could be Crystal or RC
oscillator high-frequency oscillator is a built-in for 4.6 MHz.
Instruction set
: 107 powerful instructions.
Instruction cycle time : 1.7us for 4.6 MHz (high speed clock).
244 µs for 32768 Hz (low speed clock).
ROM capacity
: 8192 X 8 bits.
RAM capacity
: 244 X 4 bits.
Input port
: 1 port (P0). P0(0..3) and IDLE releasing function are available by mask option.
Bidirection port
: 2 ports (P4, P8). P4.1 is shared with HTC external input. P8(0..3) and IDLE releasing
function are available by mask option.
12-bit timer/counter : Two 12-bit timer/counters are programmable for timer, event counter and pulse width
measurement.
High speed timer/counter : One 8-bit high speed timer/counters is programmable for auto load timer, melody
output and pulse width measurement.
Speech synthesizer : 160K Speech ROM.
Built-in time base counter : 22 stages.
Subroutine nesting
: Up to 13 levels.
Interrupt
: External . . . . . 1 input interrupt sources.
Internal . . . . . . 2 Timer overflow interrupts, 1 time base interrupt.
1 high speed timer/counter overflow interrupt.
1 Speech ending interrupt.
LCD driver
: 32 X 4 dots, 1/4,1/3,1/2, static 4 kinds of duty Type selectable, 1/2 bias, 1/3 bias, 2 kinds
bias Type selectable.
Power saving function : SLOW, IDLE, STOP operation mode.
Package type
: Chip form. . . . .63 pins.
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APPLICATIONS
EM73880 is suitable for application in family applicance, consumer products, hand held games and the toy
controller.
* This specification are subject to be changed without notice.
11.30.2001
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EMC [ ELAN MICROELECTRONICS CORP ]
