Datasheet

© 2009 Microchip Technology Inc. DS39632E-page 15
PIC18F2455/2550/4455/4550
PORTC is a bidirectional I/O port.
RC0/T1OSO/T13CKI
RC0
T1OSO
T13CKI
11
I/O
O
I
ST
—
ST
Digital I/O.
Timer1 oscillator output.
Timer1/Timer3 external clock input.
RC1/T1OSI/CCP2/UOE
RC1
T1OSI
CCP2
(2)
UOE
12
I/O
I
I/O
O
ST
CMOS
ST
—
Digital I/O.
Timer1 oscillator input.
Capture 2 input/Compare 2 output/PWM2 output.
External USB transceiver OE
output.
RC2/CCP1
RC2
CCP1
13
I/O
I/O
ST
ST
Digital I/O.
Capture 1 input/Compare 1 output/PWM1 output.
RC4/D-/VM
RC4
D-
VM
15
I
I/O
I
TTL
—
TTL
Digital input.
USB differential minus line (input/output).
External USB transceiver VM input.
RC5/D+/VP
RC5
D+
VP
16
I
I/O
O
TTL
—
TTL
Digital input.
USB differential plus line (input/output).
External USB transceiver VP input.
RC6/TX/CK
RC6
TX
CK
17
I/O
O
I/O
ST
—
ST
Digital I/O.
EUSART asynchronous transmit.
EUSART synchronous clock (see RX/DT).
RC7/RX/DT/SDO
RC7
RX
DT
SDO
18
I/O
I
I/O
O
ST
ST
ST
—
Digital I/O.
EUSART asynchronous receive.
EUSART synchronous data (see TX/CK).
SPI data out.
RE3 — — — See MCLR
/VPP/RE3 pin.
VUSB 14 P — Internal USB 3.3V voltage regulator output, positive supply for
internal USB transceiver.
V
SS 8, 19 P — Ground reference for logic and I/O pins.
V
DD 20 P — Positive supply for logic and I/O pins.
TABLE 1-2: PIC18F2455/2550 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin
Number
Pin
Type
Buffer
Type
Description
PDIP,
SOIC
Legend: TTL = TTL compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels I = Input
O = Output P = Power
Note 1: Alternate assignment for CCP2 when CCP2MX Configuration bit is cleared.
2: Default assignment for CCP2 when CCP2MX Configuration bit is set.