PIC18F2450/4450
TABLE 1-3:
Pin Name
PIC18F4450 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Number
Pin Buffer
Type Type
Description
PDIP QFN TQFP
PORTC is a bidirectional I/O port.
RC0/T1OSO/T1CKI
RC0
15
34
35
32
35
I/O
O
I
ST
—
ST
Digital I/O.
Timer1 oscillator output.
Timer1 external clock input.
T1OSO
T1CKI
RC1/T1OSI/UOE
RC1
16
I/O
I
O
ST
CMOS
—
Digital I/O.
Timer1 oscillator input.
External USB transceiver OE output.
T1OSI
UOE
RC2/CCP1
RC2
17
23
36
42
36
42
I/O
I/O
ST
ST
Digital I/O.
CCP1
Capture 1 input/Compare 1 output/PWM 1 output.
RC4/D-/VM
RC4
D-
VM
I
I/O
I
TTL
—
TTL
Digital input.
USB differential minus line (input/output).
External USB transceiver VM input.
RC5/D+/VP
24
25
26
43
44
1
43
44
1
RC5
D+
VP
I
I/O
I
TTL
—
TTL
Digital input.
USB differential plus line (input/output).
External USB transceiver VP input.
RC6/TX/CK
RC6
I/O
O
I/O
ST
—
ST
Digital I/O.
TX
CK
EUSART asynchronous transmit.
EUSART synchronous clock (see RX/DT).
RC7/RX/DT
RC7
I/O
I
I/O
ST
ST
ST
Digital I/O.
EUSART asynchronous receive.
EUSART synchronous data (see TX/CK).
RX
DT
Legend: TTL = TTL compatible input
ST = Schmitt Trigger input with CMOS levels
= Output
CMOS = CMOS compatible input or output
I
= Input
O
P
= Power
Note 1: These pins are No Connect unless the ICPRT Configuration bit is set. For NC/ICPORTS, the pin is No
Connect unless ICPRT is set and the DEBUG Configuration bit is cleared.
© 2006 Microchip Technology Inc.
Advance Information
DS39760A-page 19
MICROCHIP [ MICROCHIP ]
