
PIC16C745/765
DS41124C-page 32
Preliminary
2000 Microchip Technology Inc.
TABLE 5-1:
PORTA FUNCTIONS
TABLE 5-2:
SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
Name
Function
Input
Type
Output
Type
Description
RA0/AN0
RA0
ST
CMOS
Bi-directional I/O
AN0
AN
—
A/D Input
RA1/AN1
RA1
ST
CMOS
Bi-directional I/O
AN1
AN
—
A/D Input
RA2/AN2
RA2
ST
CMOS
Bi-directional I/O
AN2
AN
—
A/D Input
RA3/AN3/VREF
RA3
ST
CMOS
Bi-directional I/O
AN3
AN
—
A/D Input
VREF
AN
—
A/D Positive Reference
RA4/T0CKI
RA4
ST
OD
Bi-directional I/O
T0CKI
ST
—
Timer 0 Clock Input
RA5/AN4
RA5
ST
Bi-directional I/O
AN4
AN
—
A/D Input
Legend:
OD = open drain, ST = Schmitt Trigger
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
9Fh
ADCON1
—
PCFG2
PCFG1
PCFG0
---- -000
Legend: x = unknown, u = unchanged, - = unimplemented locations read as '0'. Shaded cells are not used by PORTA.
745cov.book Page 32 Wednesday, August 2, 2000 8:24 AM