Datasheet

 2003-2013 Microchip Technology Inc. DS39609C-page 105
PIC18F6520/8520/6620/8620/6720/8720
TABLE 10-1: PORTA FUNCTIONS
TABLE 10-2: SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
Name Bit# Buffer Function
RA0/AN0 bit 0 TTL Input/output or analog input.
RA1/AN1 bit 1 TTL Input/output or analog input.
RA2/AN2/VREF- bit 2 TTL Input/output or analog input or VREF-.
RA3/AN3/VREF+ bit 3 TTL Input/output or analog input or VREF+.
RA4/T0CKI bit 4 ST Input/output or external clock input for Timer0.
Output is open-drain type.
RA5/AN4/LVDIN bit 5 TTL Input/output or slave select input for synchronous serial port or analog
input, or Low-Voltage Detect input.
OSC2/CLKO/RA6 bit 6 TTL OSC2 or clock output, or I/O pin.
Legend: TTL = TTL input, ST = Schmitt Trigger input
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
PORTA — RA6 RA5 RA4 RA3 RA2 RA1 RA0 -x0x 0000 -u0u 0000
LATA — LATA Data Output Register -xxx xxxx -uuu uuuu
TRISA — PORTA Data Direction Register -111 1111 -111 1111
ADCON1
— — VCFG1 VCFG0 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.