PIC18F4321 Datasheet, PDF (21/396 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

PIC18F4321 FAMILY
TABLE 1-3: PIC18F4221/4321 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
Pin Buffer
PDIP QFN TQFP ^{Type Type}
Description
PORTC is a bidirectional I/O port.
RC0/T1OSO/T13CKI 15 34 32
RC0
I/O ST
T1OSO
O
—
T13CKI
I
ST
Digital I/O.
Timer1 oscillator analog output.
Timer1/Timer3 external clock input.
RC1/T1OSI/CCP2
RC1
T1OSI
CCP2⁽¹⁾
16 35 35
I/O ST
Digital I/O.
I CMOS Timer1 oscillator analog input.
I/O ST
Capture 2 input/Compare 2 output/PWM 2 output.
RC2/CCP1/P1A
RC2
CCP1
P1A
17 36 36
I/O ST
I/O ST
O
—
Digital I/O.
Capture 1 input/Compare 1 output/PWM 1 output.
Enhanced CCP1 output.
RC3/SCK/SCL
RC3
SCK
SCL
18 37 37
I/O ST
I/O ST
I/O I²C
Digital I/O.
Synchronous serial clock input/output for
SPI mode.
Synchronous serial clock input/output for I²C™
mode.
RC4/SDI/SDA
RC4
SDI
SDA
23 42 42
I/O ST
I
ST
I/O I²C
Digital I/O.
SPI data in.
I²C data I/O.
RC5/SDO
RC5
SDO
24 43 43
I/O ST
O
—
Digital I/O.
SPI data out.
RC6/TX/CK
RC6
TX
CK
25 44 44
I/O ST
O
—
I/O ST
Digital I/O.
EUSART asynchronous transmit.
EUSART synchronous clock (see related RX/DT).
RC7/RX/DT
RC7
RX
DT
26 1
1
I/O ST
I
ST
I/O ST
Digital I/O.
EUSART asynchronous receive.
EUSART synchronous data (see related TX/CK).
Legend: TTL = TTL compatible input
ST = Schmitt Trigger input with CMOS levels
I²C = ST with I²C™ or SMB levels
CMOS = CMOS compatible input or output
I
= Input
P = Power
O = Output
Note 1: Default assignment for CCP2 when Configuration bit, CCP2MX, is set.
2: Alternate assignment for CCP2 when Configuration bit, CCP2MX, is cleared.
3: Special ICPORT features available in select circumstances. See Section 23.9 “Special ICPORT Features
(44-Pin TQFP Packages Only)” for more information.
© 2007 Microchip Technology Inc.
Preliminary
DS39689E-page 19