2009 Microchip Technology Inc.
DS39636D-page 107
PIC18F2X1X/4X1X
TABLE 9-7:
PORTD I/O SUMMARY
Pin
Function
TRIS
Setting
I/O
Type
Description
RD0/PSP0
RD0
0
O
DIG
LATD<0> data output.
1
I
ST
PORTD<0> data input.
PSP0
x
O
DIG
PSP read data output (LATD<0>); takes priority over port data.
x
I
TTL
PSP write data input.
RD1/PSP1
RD1
0
O
DIG
LATD<1> data output.
1
I
ST
PORTD<1> data input.
PSP1
x
O
DIG
PSP read data output (LATD<1>); takes priority over port data.
x
I
TTL
PSP write data input.
RD2/PSP2
RD2
0
O
DIG
LATD<2> data output.
1
I
ST
PORTD<2> data input.
PSP2
x
O
DIG
PSP read data output (LATD<2>); takes priority over port data.
x
I
TTL
PSP write data input.
RD3/PSP3
RD3
0
O
DIG
LATD<3> data output.
1
I
ST
PORTD<3> data input.
PSP3
x
O
DIG
PSP read data output (LATD<3>); takes priority over port data.
x
I
TTL
PSP write data input.
RD4/PSP4
RD4
0
O
DIG
LATD<4> data output.
1
I
ST
PORTD<4> data input.
PSP4
x
O
DIG
PSP read data output (LATD<4>); takes priority over port data.
x
I
TTL
PSP write data input.
RD5/PSP5/P1B
RD5
0
O
DIG
LATD<5> data output.
1
I
ST
PORTD<5> data input.
PSP5
x
O
DIG
PSP read data output (LATD<5>); takes priority over port data.
x
I
TTL
PSP write data input.
P1B
0
O
DIG
ECCP1 Enhanced PWM output, channel B; takes priority over port and
PSP data. May be configured for tri-state during Enhanced PWM
shutdown events.
RD6/PSP6/P1C
RD6
0
O
DIG
LATD<6> data output.
1
I
ST
PORTD<6> data input.
PSP6
x
O
DIG
PSP read data output (LATD<6>); takes priority over port data.
x
I
TTL
PSP write data input.
P1C
0
O
DIG
ECCP1 Enhanced PWM output, channel C; takes priority over port and
PSP data. May be configured for tri-state during Enhanced PWM
shutdown events.
RD7/PSP7/P1D
RD7
0
O
DIG
LATD<7> data output.
1
I
ST
PORTD<7> data input.
PSP7
x
O
DIG
PSP read data output (LATD<7>); takes priority over port data.
x
I
TTL
PSP write data input.
P1D
0
O
DIG
ECCP1 Enhanced PWM output, channel D; takes priority over port and
PSP data. May be configured for tri-state during Enhanced PWM
shutdown events.
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).