PIC16F84A datasheet(81/90 Pages) MICROCHIP

81 / 90 page

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DS35007C-page 81

PIC16F84A

INDEX

Absolute Maximum Ratings ................................................ 47

AC (Timing) Characteristics ................................................ 53

Architecture, Block Diagram ................................................. 3

Assembler

MPASM Assembler..................................................... 44

Banking, Data Memory ......................................................... 6

Block Diagrams

Crystal/Ceramic Resonator Operation ........................ 22

External Clock Input Operation ................................... 22

External Power-on Reset Circuit................................. 26

Interrupt Logic ............................................................. 29

On-chip Reset ............................................................. 24

PIC16F84A ................................................................... 3

PORTA

RA3:RA0 Pins ..................................................... 15

RA4 Pins ............................................................. 15

PORTB

RB3:RB0 Pins ..................................................... 17

RB7:RB4 Pins ..................................................... 17

RC Oscillator Mode ..................................................... 23

Timer0......................................................................... 19

Timer0/WDT Prescaler ............................................... 20

Watchdog Timer (WDT) .............................................. 31

C (Carry) bit .......................................................................... 8

C Compilers

MPLAB C18 ................................................................ 44

CLKIN Pin ............................................................................. 4

CLKOUT Pin ......................................................................... 4

Code Examples

Clearing RAM Using Indirect Addressing.................... 11

Data EEPOM Write Verify........................................... 14

Indirect Addressing ..................................................... 11

Initializing PORTA....................................................... 15

Initializing PORTB....................................................... 17

Reading Data EEPROM ............................................. 14

Saving STATUS and W Registers in RAM ................. 30

Writing to Data EEPROM............................................ 14

Code Protection ........................................................... 21

, 33

Configuration Bits................................................................ 21

Configuration Word ............................................................. 21

Conversion Considerations ................................................. 78

Customer Change Notification Service ............................... 85

Customer Notification Service............................................. 85

Customer Support ............................................................... 85

Data EEPROM Memory ...................................................... 13

Associated Registers .................................................. 14

EEADR Register ..............................................7

, 13, 25

EECON1 Register............................................7

, 13, 25

EECON2 Register............................................7

, 13, 25

EEDATA Register ............................................7

, 13, 25

Write Complete Enable (EEIE Bit) .............................. 29

Write Complete Flag (EEIF Bit)................................... 29

Data EEPROM Write Complete .......................................... 29

Data Memory ........................................................................ 6

Bank Select (RP0 Bit) ................................................... 6

Banking ......................................................................... 6

DC bit .................................................................................... 8

DC Characteristics........................................................49

, 51

Development Support ......................................................... 43

Device Overview................................................................... 3

EECON1 Register

EEIF Bit ...................................................................... 29

Electrical Characteristics .................................................... 47

Load Conditions.......................................................... 54

Parameter Measurement Information ......................... 54

PIC16F84A-04 Voltage-Frequency Graph ................. 48

PIC16F84A-20 Voltage-Frequency Graph ................. 48

PIC16LF84A-04 Voltage-Frequency Graph ............... 48

Temperature and Voltage Specifications - AC ........... 54

Endurance ............................................................................ 1

Errata .................................................................................... 2

External Clock Input (RA4/T0CKI). See Timer0

External Interrupt Input (RB0/INT). See Interrupt Sources

External Power-on Reset Circuit......................................... 26

Firmware Instructions ......................................................... 35

I/O Ports ............................................................................. 15

ID Locations..................................................................21

, 33

In-Circuit Serial Programming (ICSP)...........................21

, 33

INDF Register ....................................................................... 7

Indirect Addressing ............................................................. 11

FSR Register .............................................. 6

, 7, 11, 25

INDF Register.................................................. 7

, 11, 25

Instruction Format............................................................... 35

Instruction Set..................................................................... 35

ADDLW....................................................................... 37

ADDWF ...................................................................... 37

ANDLW....................................................................... 37

ANDWF ...................................................................... 37

BCF ............................................................................ 37

BSF............................................................................. 37

BTFSC ........................................................................ 38

BTFSS ........................................................................ 37

CALL........................................................................... 38

CLRF .......................................................................... 38

CLRW ......................................................................... 38

CLRWDT .................................................................... 38

COMF ......................................................................... 38

DECF.......................................................................... 38

DECFSZ ..................................................................... 39

GOTO ......................................................................... 39

INCF ........................................................................... 39

INCFSZ....................................................................... 39

IORLW ........................................................................ 39

IORWF........................................................................ 39

MOVF ......................................................................... 40

MOVLW ...................................................................... 40

MOVWF...................................................................... 40

NOP............................................................................ 40

RETFIE....................................................................... 40

RETLW ....................................................................... 40

RETURN..................................................................... 40

RLF............................................................................. 41

RRF ............................................................................ 41

SLEEP ........................................................................ 41

SUBLW....................................................................... 41

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