AT8PE68一级代理替代EM78P468优势

FEATURES

? Only 49 instructions

? 4K x 13 bits on chip EPROM/ROM

? All ROM/EPROM area GOTO/FGOTO instruction

? All ROM/EPROM area subroutine CALL/FCALL instruction

? Totally 272 x 8 bits on chip general purpose registers (SRAM):

- 144 bytes general purpose register

- 128 bytes on-chip data RAM

? 8-level deep hardware stack

? Direct, indirect addressing modes for data accessing

? 8-bit real time clock/counter (Timer0) with 8-bit programmable prescaler

? Four sets of 8-bit auto reload counter/timer can be used as IROUT/PWM generator or interrupt sources

- Counter 1: independent counter

- Counter 2, High Pulse Width Timer, and Low Pulse Width Timer shared with IR function

? One IROUT/PWM generator

? LCD driver with 4(common) x 32(segment) pixels; 1/3, 1/2 bias and 1/4, 1/3, 1/2 duty selection

? 3 channels of 15-bit resolution Resistor to Frequency Converter (RFC) output

? Internal Power-on Reset (POR)

? Built-in Low Voltage Detector (LVD) for Brown-out Reset (BOR)

? Power-up Reset Timer (PWRT) and Oscillator Start-up Timer(OST)

? On chip Watchdog Timer (WDT) with internal oscillator and soft-ware watch-dog enable/disable control

? Four I/O ports IOA, IOB, IOC and IOD with independent direction control

? Two output only ports IOE and IOF

? Soft-ware I/O pull-high/pull-down or open-drain control

? Seven internal interrupt source: Timer0, Counter1, Counter2, High-pulse width timer, Low-pulse width timer, RFC and Fs divider; Three external interrupt source: INT0 pin, INT1 pin and Port B / Port D input status change

? Wake-up from SLEEP/IDLE by Port B/Port D input change

? Operation modes:

- Normal mode : CPU operate on high frequency main-oscillator

- Green mode : CPU operate on low frequency sub-oscillator

- Idle mode : CPU idle, LCD display remains working

- Sleep mode : whole chip stop working

? Dual clock Operation: main-oscillator and sub-oscillator

? Selectable main-oscillator options:

- ERIC: External Resistor/Internal Capacitor Oscillator

- XT: Crystal/Resonator Oscillator

- HF: High Frequency Crystal/Resonator Oscillator

- PLL: Phase lock loop

? Selectable sub-oscillator options:

- ERIC: External Resistor/Internal Capacitor Oscillator

- LF: Low Frequency Crystal Oscillator

? Wide-operating voltage range:

- EPROM : 2.3V to 5.5V

- ROM : 2.3V to 5.5V