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PIC16F84A Datasheet(PDF) 22 Page - Microchip Technology

Part # PIC16F84A
Description  18-pin Flash/EEPROM 8-Bit Microcontrollers
Download  124 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC16F84A Datasheet(HTML) 22 Page - Microchip Technology

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PIC16F8X
DS30430C-page 22
© 1998 Microchip Technology Inc.
TABLE 5-1
PORTA FUNCTIONS
TABLE 5-2
SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
Name
Bit0
Buffer Type
Function
RA0
bit0
TTL
Input/output
RA1
bit1
TTL
Input/output
RA2
bit2
TTL
Input/output
RA3
bit3
TTL
Input/output
RA4/T0CKI
bit4
ST
Input/output or external clock input for TMR0.
Output is open drain type.
Legend: TTL = TTL input, ST = Schmitt Trigger input
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
Power-on
Reset
Value on all
other resets
05h
PORTA
—
—
—
RA4/T0CKI
RA3
RA2
RA1
RA0
---x xxxx
---u uuuu
85h
TRISA
—
—
—
TRISA4
TRISA3
TRISA2
TRISA1
TRISA0
---1 1111
---1 1111
Legend: x = unknown, u = unchanged, - = unimplemented read as '0'. Shaded cells are unimplemented, read as '0'


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