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Description
DEVICE OVERVIEW
This document contains device specific information for the operation of the PIC16F84A device. Additional information may be found in the PICmicro™ Mid Range Reference Manual, (DS33023), which may be downloaded from the Microchip website. The Refer ence Manual should be considered a complementary document to this data sheet, and is highly recom mended reading for a better understanding of the device architecture and operation of the peripheral modules.
High Performance RISC CPU Features:
• Only 35 single word instructions to learn
• All instructions single-cycle except for program branches which are two-cycle
• Operating speed: DC - 20 MHz clock input DC - 200 ns instruction cycle
• 1024 words of program memory
• 68 bytes of Data RAM
• 64 bytes of Data EEPROM
• 14-bit wide instruction words
• 8-bit wide data bytes
• 15 Special Function Hardware registers
• Eight-level deep hardware stack
• Direct, indirect and relative addressing modes
• Four interrupt sources:
- External RB0/INT pin
- TMR0 timer overflow
- PORTB<7:4> interrupt-on-change
- Data EEPROM write complete
Peripheral Features:
• 13 I/O pins with individual direction control
• High current sink/source for direct LED drive
- 25 mA sink max. per pin
- 25 mA source max. per pin
• TMR0: 8-bit timer/counter with 8-bit programmable prescaler
Special Microcontroller Features:
• 10,000 erase/write cycles Enhanced FLASH Program memory typical
• 10,000,000 typical erase/write cycles EEPROM Data memory typical
• EEPROM Data Retention > 40 years
• In-Circuit Serial Programming™ (ICSP™) - via two pins
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- Vacuum packaging
- Anti-static packaging
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