8位单片机 42条精简指令集  易于编程

5级堆栈  振荡频率：32K~20M 

ROM:1K    RAM:49 BYTE    I/O:6~12个 （8PIN=6I/O  14PIN=12I/O）

内置4种振荡频率，无需晶振：455K，1M，4M，8M

SLEEP省电模式：电流最小 小于1UA。

工作电压：2.3V~5.5V！

Only 42 single word instructions
? All instructions are single cycle except for program branches which are two-cycle
? 13-bit wide instructions
? All ROM/EPROM area GOTO instruction
? All ROM/EPROM area subroutine CALL instruction
? 8-bit wide data path
? 5-level deep hardware stack
? Operating speed: DC-20 MHz clock input
DC-100 ns instruction cycle
Device Pins # I/O # EPROM/ROM (Byte) RAM (Byte)
AT8PE53/E53E 14 12 1K 49
? Direct, indirect addressing modes for data accessing
? 8-bit real time clock/counter (Timer0) with 8-bit programmable prescaler
? 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 for reliable operation and soft-ware watch-dog
enable/disable control
? Two I/O ports IOA and IOB with independent direction control
? Soft-ware I/O pull-high/pull-down or open-drain control
? One internal interrupt source: Timer0 overflow; Two external interrupt source: INT pin, Port B input change
? Wake-up from SLEEP by INT pin or Port B input change
? Power saving SLEEP mode
? Built-in 8MHz, 4MHz, 1MHz, and 455KHz internal RC oscillator
? Programmable Code Protection
? Built-in internal RC oscillator
? Selectable oscillator options:
- ERC: External Resistor/Capacitor Oscillator
- HF: High Frequency Crystal/Resonator Oscillator
- XT: Crystal/Resonator Oscillator
- LF: Low Frequency Crystal Oscillator
- IRC: Internal Resistor/Capacitor Oscillator
- ERIC: External Resistor/Internal Capacitor Oscillator
? Wide-operating voltage range:
- EPROM : 2.3V to 5.5V
- ROM : 2.3V to 5.5V