Datasheet
PIC18F6525/6621/8525/8621
DS39612C-page 14 2003-2013 Microchip Technology Inc.
PORTC is a bidirectional I/O port.
RC0/T1OSO/T13CKI
RC0
T1OSO
T13CKI
30 36
I/O
O
I
ST
—
ST
Digital I/O.
Timer1 oscillator output.
Timer1/Timer3 external clock input.
RC1/T1OSI/ECCP2/P2A
RC1
T1OSI
ECCP2
(2)
P2A
(2)
29 35
I/O
I
I/O
O
ST
CMOS
ST
—
Digital I/O.
Timer1 oscillator input.
Enhanced Capture 2 input, Compare 2
output, PWM 2 output.
ECCP2 output P2A.
RC2/ECCP1/P1A
RC2
ECCP1
P1A
33 43
I/O
I/O
O
ST
ST
—
Digital I/O.
Enhanced Capture 1 input, Compare 1
output, PWM 1 output.
ECCP1 output P1A.
RC3/SCK/SCL
RC3
SCK
SCL
34 44
I/O
I/O
I/O
ST
ST
ST
Digital I/O.
Synchronous serial clock input/output for
SPI™ mode.
Synchronous serial clock input/output for
I
2
C™ mode.
RC4/SDI/SDA
RC4
SDI
SDA
35 45
I/O
I
I/O
ST
ST
ST
Digital I/O.
SPI data in.
I
2
C data I/O.
RC5/SDO
RC5
SDO
36 46
I/O
O
ST
—
Digital I/O.
SPI data out.
RC6/TX1/CK1
RC6
TX1
CK1
31 37
I/O
O
I/O
ST
—
ST
Digital I/O.
USART1 asynchronous transmit.
USART1 synchronous clock
(see RX1/DT1).
RC7/RX1/DT1
RC7
RX1
DT1
32 38
I/O
I
I/O
ST
ST
ST
Digital I/O.
USART1 asynchronous receive.
USART1 synchronous data
(see TX1/CK1).
TABLE 1-2: PIC18F6525/6621/8525/8621 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
Pin
Type
Buffer
Type
Description
PIC18F6X2X PIC18F8X2X
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 ECCP2/P2A in PIC18F8525/8621 devices when CCP2MX (CONFIG3H<0>) is not set (all
Program Memory modes except Microcontroller).
2: Default assignment for ECCP2/P2A when CCP2MX is set (all devices).
3: External memory interface functions are only available on PIC18F8525/8621 devices.
4: Default assignment for P1B/P1C/P3B/P3C for PIC18F8525/8621 devices when ECCPMX (CONFIG3H<1>) is set and for
all PIC18F6525/6621 devices.
5: Alternate assignment for ECCP2/P2A in PIC18F8525/8621 devices when CCP2MX is not set (Microcontroller mode).
6: PORTH and PORTJ (and their multiplexed functions) are only available on PIC18F8525/8621 devices.
7: Alternate assignment for P1B/P1C/P3B/P3C for PIC18F8525/8621 devices when ECCPMX (CONFIG3H<1>) is not set.
8: 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 D001 for details.
9: RG5 is multiplexed with MCLR
and is only available when the MCLR Resets are disabled.