PIC18F87J10 Datasheet, PDF (119/394 Pages) Microchip Technology – 64/80-Pin High-Performance, 1-Mbit Flash Microcontrollers with nanoWatt Technology

PIC18F87J10 FAMILY
TABLE 10-3: PORTA FUNCTIONS
Pin Name
Function
TRIS
Setting
I/O
I/O
Type
Description
RA0/AN0
RA0
0
O
DIG LATA<0> data output; not affected by analog input.
1
I
TTL PORTA<0> data input; disabled when analog input enabled.
AN0
I
ANA A/D input channel 0. Default input configuration on POR; does not
affect digital output.
RA1/AN1
RA1
0
O
DIG LATA<1> data output; not affected by analog input.
1
I
TTL PORTA<1> data input; disabled when analog input enabled.
AN1
I
ANA A/D input channel 1. Default input configuration on POR; does not
affect digital output.
RA2/AN2/VREF-
RA2
0
O
DIG LATA<2> data output; not affected by analog input. Disabled when
CVREF output enabled.
1
I
TTL PORTA<2> data input. Disabled when analog functions enabled;
disabled when CVREF output enabled.
AN2
1
I
ANA A/D input channel 2 and Comparator C2+ input. Default input
configuration on POR; not affected by analog output.
VREF-
1
I
ANA A/D and Comparator low reference voltage input.
RA3/AN3/VREF+ RA3
0
O
DIG LATA<3> data output; not affected by analog input.
1
I
TTL PORTA<3> data input; disabled when analog input enabled.
AN3
1
I
ANA A/D input channel 3. Default input configuration on POR.
VREF+
1
I
ANA A/D high reference voltage input.
RA4/T0CKI
RA4
0
O
DIG LATA<4> data output.
1
I
ST PORTA<4> data input; default configuration on POR.
T0CKI
x
I
ST Timer0 clock input.
RA5/AN4
RA5
0
O
DIG LATA<5> data output; not affected by analog input.
1
I
TTL PORTA<5> data input; disabled when analog input enabled.
AN4
1
I
ANA A/D input channel 4. Default configuration on POR.
Legend: PWR = Power Supply, O = Output, I = Input, ANA = Analog Signal, DIG = Digital Output, ST = Schmitt Buffer Input,
TTL = TTL Buffer Input, x = Don’t care (TRIS bit does not affect port direction or is overridden for this option).
TABLE 10-4: SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
PORTA
—
—
RA5
RA4
RA3
RA2
LATA
—
—
LATA5 LATA4 LATA3 LATA2
TRISA
—
—
TRISA5 TRISA4 TRISA3 TRISA2
ADCON1
—
—
VCFG1 VCFG0 PCFG3 PCFG2
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by PORTA.
RA1
LATA1
TRISA1
PCFG1
Bit 0
RA0
LATA0
TRISA0
PCFG0
Reset
Values
on page
52
52
52
50
 2005 Microchip Technology Inc.
Advance Information
DS39663A-page 117