PIC16C63A/65B/73B/74B
TABLE 5-1:
Name
RA0/AN0
(1)
RA1/AN1
(1)
RA2/AN2
(1)
RA3/AN3/V
REF
(1)
RA4/T0CKI
RA5/SS/AN4
(1)
PORTA FUNCTIONS
Bit#
bit0
bit1
bit2
bit3
bit4
bit5
Buffer
TTL
TTL
TTL
TTL
ST
TTL
Function
Digital input/output or analog input.
Digital input/output or analog input.
Digital input/output or analog input.
Digital input/output or analog input or V
REF.
Digital 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.
Legend: TTL = TTL input, ST = Schmitt Trigger input
Note 1:
The A/D is not implemented on the PIC16C63A/65B. Pins will operate as digital I/O only. ADCON1 is not
implemented; maintain this register clear.
TABLE 5-2:
Address
05h
85h
9Fh
SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
Bit 7
—
—
—
Bit 6
—
—
—
Bit 5
RA5
Bit 4
RA4
Bit 3
RA3
Bit 2
RA2
Bit 1
RA1
Bit 0
RA0
Value on:
POR,
BOR
--0x 0000
--11 1111
Name
PORTA
TRISA
ADCON1
(1)
Value on
all other
RESETS
--0u 0000
--11 1111
---- -000
PORTA Data Direction Register
—
—
—
PCFG2
PCFG1 PCFG0
---- -000
Legend:
x
= unknown,
u
= unchanged, - = unimplemented locations read as '0'. Shaded cells are not used by PORTA.
Note 1:
The A/D is not implemented on the PIC16C63A/65B. Pins will operate as digital I/O only. ADCON1 is not implemented;
maintain this register clear.
DS30605C-page 30
2000 Microchip Technology Inc.
MICROCHIP [ MICROCHIP TECHNOLOGY ]
