Datasheet

 2003-2013 Microchip Technology Inc. DS39609C-page 15
PIC18F6520/8520/6620/8620/6720/8720
PORTD is a bidirectional I/O port. These
pins have TTL input buffers when external
memory is enabled.
RD0/PSP0/AD0
RD0
PSP0
AD0
(3)
58 72
I/O
I/O
I/O
ST
TTL
TTL
Digital I/O.
Parallel Slave Port data.
External memory address/data 0.
RD1/PSP1/AD1
RD1
PSP1
AD1
(3)
55 69
I/O
I/O
I/O
ST
TTL
TTL
Digital I/O.
Parallel Slave Port data.
External memory address/data 1.
RD2/PSP2/AD2
RD2
PSP2
AD2
(3)
54 68
I/O
I/O
I/O
ST
TTL
TTL
Digital I/O.
Parallel Slave Port data.
External memory address/data 2.
RD3/PSP3/AD3
RD3
PSP3
AD3
(3)
53 67
I/O
I/O
I/O
ST
TTL
TTL
Digital I/O.
Parallel Slave Port data.
External memory address/data 3.
RD4/PSP4/AD4
RD4
PSP4
AD4
(3)
52 66
I/O
I/O
I/O
ST
TTL
TTL
Digital I/O.
Parallel Slave Port data.
External memory address/data 4.
RD5/PSP5/AD5
RD5
PSP5
AD5
(3)
51 65
I/O
I/O
I/O
ST
TTL
TTL
Digital I/O.
Parallel Slave Port data.
External memory address/data 5.
RD6/PSP6/AD6
RD6
PSP6
AD6
(3)
50 64
I/O
I/O
I/O
ST
TTL
TTL
Digital I/O.
Parallel Slave Port data.
External memory address/data 6.
RD7/PSP7/AD7
RD7
PSP7
AD7
(3)
49 63
I/O
I/O
I/O
ST
TTL
TTL
Digital I/O.
Parallel Slave Port data.
External memory address/data 7.
TABLE 1-2: PIC18FXX20 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
Pin
Type
Buffer
Type
Description
PIC18F6X20 PIC18F8X20
Legend: TTL = TTL compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels Analog = Analog input
I = Input O = Output
P = Power OD = Open-Drain (no P diode to V
DD)
Note 1: Alternate assignment for CCP2 when CCP2MX is not selected (all operating modes except
Microcontroller).
2: Default assignment when CCP2MX is set.
3: External memory interface functions are only available on PIC18F8X20 devices.
4: CCP2 is multiplexed with this pin by default when configured in Microcontroller mode. Otherwise, it is
multiplexed with either RB3 or RC1.
5: PORTH and PORTJ are only available on PIC18F8X20 (80-pin) devices.
6: AV
DD must be connected to a positive supply and AVSS must be connected to a ground reference for
proper operation of the part in user or ICSP modes. See parameter D001A for details.