PIC16F871 Microchip Technology Inc., PIC16F871 Datasheet - Page 36

• Manufacturer Part Number: PIC16F871
• Description: 28/40-pin, 8-bit Cmos Flash Microcontrollers
• Manufacturer: Microchip Technology Inc.

PIC16F870/871
TABLE 4-1:
TABLE 4-2:
DS30569B-page 34
05h
85h
9Fh
Legend:
Address
RA0/AN0
RA1/AN1
RA2/AN2
RA3/AN3/V
RA4/T0CKI
RA5/AN4
Legend: TTL = TTL input, ST = Schmitt Trigger input
Name
PORTA
TRISA
ADCON1 ADFM
x = unknown, u = unchanged, - = unimplemented locations read as '0'.
Shaded cells are not used by PORTA.
REF
Name
PORTA FUNCTIONS
SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
Bit 7
Bit#
bit0
bit1
bit2
bit3
bit4
bit5
—
—
Bit 6
—
—
—
Buffer
TTL
TTL
TTL
TTL
TTL
ST
PORTA Data Direction Register
Bit 5
RA5
—
Input/output or analog input.
Input/output or analog input.
Input/output or analog input.
Input/output or analog input or V
Input/output or external clock input for Timer0. Output is open drain type.
Input/output or analog input.
Bit 4
RA4
—
PCFG3 PCFG2 PCFG1 PCFG0 --0- 0000 --0- 0000
Bit 3
RA3
Bit 2
RA2
Bit 1
RA1
Function
REF.
Bit 0
RA0
 2003 Microchip Technology Inc.
--0x 0000 --0u 0000
--11 1111 --11 1111
POR, BOR
Value on:
Value on
RESETS
all other