PIC16LF876A-I Datasheet, PDF (43/234 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers

PIC16F87XA
TABLE 4-1: PORTA FUNCTIONS
Name
Bit# Buffer
Function
RA0/AN0
bit 0
RA1/AN1
bit 1
RA2/AN2/VREF-/CVREF bit 2
RA3/AN3/VREF+
bit 3
RA4/T0CKI/C1OUT
bit 4
TTL Input/output or analog input.
TTL Input/output or analog input.
TTL Input/output or analog input or VREF- or CVREF.
TTL Input/output or analog input or VREF+.
ST Input/output or external clock input for Timer0 or comparator output.
Output is open-drain type.
RA5/AN4/SS/C2OUT
bit 5 TTL Input/output or analog input or slave select input for synchronous serial
port or comparator output.
Legend: TTL = TTL input, ST = Schmitt Trigger input
TABLE 4-2: SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
Address Name
Bit 7 Bit 6
Bit 5
Bit 4 Bit 3
Bit 2
Bit 1
Bit 0
Value on:
POR, BOR
Value on
all other
Resets
05h
PORTA
—
—
RA5
RA4 RA3
RA2
RA1
RA0 --0x 0000 --0u 0000
85h
TRISA
—
— PORTA Data Direction Register
--11 1111 --11 1111
9Ch
CMCON C2OUT C1OUT C2INV C1INV CIS
CM2 CM1 CM0 0000 0111 0000 0111
9Dh
CVRCON CVREN CVROE CVRR
—
CVR3 CVR2 CVR1 CVR0 000- 0000 000- 0000
9Fh
ADCON1 ADFM ADCS2 —
— PCFG3 PCFG2 PCFG1 PCFG0 00-- 0000 00-- 0000
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 PCFG3:PCFG0 = 0100, 0101, 011x, 1101, 1110, 1111.
 2001-2013 Microchip Technology Inc.
DS39582C-page 43