PIC18F2331/2431/4331/4431
TABLE 11-7: PORTD I/O SUMMARY
TRIS
Setting
I/O
Pin
Function
I/O
Description
Type
RD0/T0CKI/
T5CKI
RD0
0
1
1
1
0
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
1
0
1
0
0
1
0
0
1
0
O
I
DIG
ST
LATD<0> data output.
PORTD<0> data input.
(1)
T0CKI
I
ST
Timer0 alternate clock input.
Timer5 alternate clock input.
LATD<1> data output.
(1)
T5CKI
I
ST
RD1/SDO
RD1
O
I
DIG
ST
PORTD<1> data input.
(1)
SDO
O
O
I
DIG
DIG
ST
SPI data out; takes priority over port data.
LATD<2> data output.
RD2/SDI/SDA
RD2
PORTD<2> data input.
(1)
SDI
I
ST
SPI data input (SSP module).
(1)
2
SDA
O
I
DIG
I C™ data output (SSP module); takes priority over port data.
2
2
I C
I C data input (SSP module).
RD3/SCK/SCL
RD3
O
I
DIG
ST
LATD<3> data output.
PORTD<3> data input.
(1)
SCK
O
I
DIG
ST
SPI clock output (SSP module); takes priority over port data.
SPI clock input (SSP module).
(1)
2
SCL
O
I
DIG
I C clock output (SSP module); takes priority over port data.
2
2
I C
I C clock input (SSP module); input type depends on module setting.
RD4/FLTA
RD4
O
I
DIG
ST
LATD<4> data output.
PORTD<4> data input.
(2)
FLTA
I
ST
Fault Interrupt Input Pin A.
LATD<5> data output.
RD5/PWM4
RD6/PWM6
RD7/PWM7
RD5
O
I
DIG
ST
PORTD<5> data input.
(3)
PWM4
O
O
I
DIG
DIG
ST
PWM Output 4; takes priority over port data.
LATD<6> data output.
RD6
PORTD<6> data input.
PWM6
RD7
O
O
I
DIG
DIG
ST
PWM Output 6; takes priority over port data.
LATD<7> data output.
PORTD<7> data input.
PWM7
O
DIG
PWM Output 7; takes priority over port data.
Legend:
DIG = Digital level output; TTL = TTL input buffer; ST = Schmitt Trigger input buffer;
x = Don’t care (TRIS bit does not affect port direction or is overridden for this option).
Note 1: RC3 is the alternate pin for T0CKI/T5CKI; RC4 is the alternate pin for SDI/SDA; RC5 is the alternate pin for SCK/SCL;
RC7 is the alternate pin for SDO.
2: RC1 is the alternate pin for FLTA.
3: RB5 is the alternate pin for PWM4.
TABLE 11-8: SUMMARY OF REGISTERS ASSOCIATED WITH PORTD
Reset Values
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
on Page:
PORTD
LATD
RD7
RD6
RD5
RD4
RD3
RD2
RD1
RD0
57
57
57
LATD Data Output Register
TRISD
PORTD Data Direction Register
2010 Microchip Technology Inc.
DS39616D-page 123
MICROCHIP [ MICROCHIP ]
