EM73866 Datasheet, PDF (1/39 Pages) ELAN Microelectronics Corp – 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

EM73866
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
GENERAL DESCRIPTION
EM73866 is an advanced single chip CMOS 4-bit micro-controller. It contains 8K-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.
EM73866 also contains 6 interrupt sources, 2 input port, 7 bidirection ports, Max LCD display (32x4), built-in
watch-dog-timer and high speed Timer/Counter.
EM73866 has plentiful operating modes (SLOW, IDLE, STOP) intended to reduce the power consumption.
FEATURES
• Operation voltage : 2.2V ~ 6V.
• Clock source
: 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).
244 µs for 32768 Hz (low speed clock).
122 µs for 32768 Hz (low speed clock with frequency Double)
• ROM capacity
: 8192 X 8 bits.
• RAM capacity
: 500 X 4 bits.
• Input port
: 2 ports (P0, P2), P0(0..3), P2 (0..3), IDLE/STOP releasing function are available
by mask option.
• Bidirection port
: 7 ports (P1, P3, P4, P5, P6, P7, P8). P4.1 is shared with HTC external input.
IDLE/STOP releasing function are available by mask option for P8(0..3).
• 12-bit timer/counter : Two 12-bit timer/counters are programmable for timer, event counter and pulse width
measurement.
• 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, melody out or pulse width measurement.
• 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
: Max 32 X 4 dots, 1/4, 1/3, 1/2 static four kinds of duty selectable, 1/2 or 1/3 bias choice
and dynamic resistor available.
• Power saving function :SLOW, IDLE, STOP operation mode.
• Package type
: Chip form 76 pins.
APPLICATIONS
EM73866 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.
12.29.1999 1