PIC16F7X
TABLE 4-1:
Name
PORTA FUNCTIONS
Bit#
Buffer
Function
RA0/AN0
bit0
bit1
bit2
bit3
bit4
bit5
TTL
TTL
TTL
TTL
ST
Input/output or analog input.
Input/output or analog input.
Input/output or analog input.
RA1/AN1
RA2/AN2
RA3/AN3/VREF
RA4/T0CKI
RA5/SS/AN4
Input/output or analog input or VREF.
Input/output or external clock input for Timer0. Output is open drain type.
Input/output or slave select input for synchronous serial port or analog input.
TTL
Legend: TTL = TTL input, ST = Schmitt Trigger input
TABLE 4-2:
SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
Value on: Value on all
Address Name
Bit 7 Bit 6 Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
POR,
BOR
other
RESETS
--0x 0000 --0u 0000
--11 1111 --11 1111
---- -000 ---- -000
05h
85h
9Fh
PORTA
TRISA
—
—
—
—
—
—
RA5
RA4
RA3
RA2
RA1
RA0
PORTA Data Direction Register
PCFG2 PCFG1 PCFG0
ADCON1
—
—
—
Legend: x= unknown, u= unchanged, - = unimplemented locations read as '0'. Shaded cells are not used by PORTA.
Note: When using the SSP module in SPI Slave mode and SS enabled, the A/D converter must be set to one of
the following modes where PCFG2:PCFG0 = 100, 101, 11x.
DS30325B-page 32
2002 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
