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| 名称：AT8A21单片机 |  | | 编号：Pro200751193344 | | 型号：兼容MDT10P43 | | | | | |  |  | | Devices Included in this Data Sheet:
• AT8A21E : EPROM devices
• AT8A21 : Mask ROM devices
FEATURES
• Only 38 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/LGOTO instruction
• All ROM/EPROM area subroutine CALL/LCALL instruction
• 8-bit wide data path
• 2-level deep hardware stack
• 512 x 13 bits on chip EPROM/ROM
• 72 x 8 bits on chip general purpose registers (SRAM)
• Operating speed: DC-20 MHz clock input
DC-100 ns instruction cycle
• 4 channel comparator
• 1 channel IR output with programmable frequency and duty cycle
• 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
• Wake-up from SLEEP by Port IOA/IOB input status change
• Power saving SLEEP mode
• Programmable Code Protection
• 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 (455KHz)
- ERIC: External Resistor/Internal Capacitor Oscillator
• Wide-operating voltage range:
- EPROM : 2.3V to 5.5V
- ROM : 2.3V to 5.5V | | | 点击次数：721 |  |
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