EM73P968
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
GENERAL DESCRIPTION
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EM73P968 is an advanced single chip CMOS 4-bit one time programming (OTP) micro-controller. It contains
16K-byte ROM, 2.5K nibbles RAM, 4-bit ALU, 13-level subroutine nesting, 22-stage time base, two 12-bit timer/
counters for the kernel function. EM73P968 also contains 6 interrupt sources, 1 input port, 8 bidirection ports, Max
LCD display (52x5), built-in watch-dog-timer and high speed Timer/Counter.
An analog to digital (A/D) converter having 8-bit multipler analog input and 8-bit resolution. Serial peripheral
interface (SPI).
EM73P968 has plentiful operating modes (SLOW, IDLE, STOP) intended to reduce the power consumption.
FEATURES
Operation voltage
Clock source
: 2.2V ~ 6V.
: Dual clock system. Low-frequency oscillator is Crystal or RC oscillator (32K Hz,
connect an external resistor) by mask option and high-frequency oscillator is RC
(Connect an external resistor) or Crystall oscillator.
Instruction set
: 107 powerful instructions.
Instruction cycle time : Up to 2us for 4 MHz (high speed clock).
122 µs for 32768 Hz (low speed clock with frequency Double)
ROM capacity
: 16K x 8 bits.
RAM capacity
: 2.5K x 4 bits.
Input port
: 1 port, P0(0..3), IDLE/STOP releasing function are available by mask option.
Output port
: 9 pins (P17.0, P30, P31), P17.0, P30, P31 are shared with LCD pins.
Bidirection port
: 9 ports (P1, P2, P4, P5, P6, P7, P8, P11, P15). IDLE/STOP releasing function are
available by mask option for P8(0..3), P5 and P6 have high current sink.
12-bit timer/counter : Two 12-bit timer/counters are programmable for timer, event counter and pulse width
measurement.
A/D converter
: An analog to digital (A/D) converter having 8-bit multipler analog input and 8-bit
resolution.
SPI
: Serial peripheral interface.
Built-in watch-dog-timer : It is available by mask option.
Built-in time base counter : 22 stages.
Built-in high Speed Timer/Counter : Could be timer.
Subrountine nesting : Up to 13 levels.
Interrupt
: External . . . . . 2 input interrupt sources.
Internal . . . . . . 2 Timer overflow interrupts, 1 time base interrupt.
1 high speed counter overflow interrupt.
LCD driver
: 52 X 5 dots, 1/3 bias, 1/4 or 1/5 duty by mask option.
Power saving function : SLOW, IDLE, STOP operation mode.
Package type
: Chip form.
QFP 128 pin.
APPLICATIONS
EM73P968 is suitable for application in family applicance, consumer products, hand held games, calculator and
the toy controller.
* This specification are subject to be changed without notice.
8.14.2001
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EMC [ ELAN MICROELECTRONICS CORP ]
