PIC18F4321 Datasheet, PDF (17/396 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

PIC18F4321 FAMILY
TABLE 1-2: PIC18F2221/2321 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
SPDIP,
Pin Buffer
SOIC, QFN ^{Type Type}
SSOP
Description
PORTC is a bidirectional I/O port.
RC0/T1OSO/T13CKI
RC0
T1OSO
T13CKI
11
8
I/O ST Digital I/O.
O—
Timer1 oscillator analog output.
I ST Timer1/Timer3 external clock input.
RC1/T1OSI/CCP2
RC1
T1OSI
CCP2⁽¹⁾
12
9
I/O ST Digital I/O.
I Analog Timer1 oscillator analog input.
I/O ST Capture 2 input/Compare 2 output/PWM 2 output.
RC2/CCP1
RC2
CCP1
13 10
I/O ST Digital I/O.
I/O ST Capture 1 input/Compare 1 output/PWM 1 output.
RC3/SCK/SCL
RC3
SCK
SCL
14 11
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
15 12
I/O ST
I ST
I/O I²C
Digital I/O.
SPI data in.
I²C data I/O.
RC5/SDO
RC5
SDO
16 13
I/O ST
O—
Digital I/O.
SPI data out.
RC6/TX/CK
RC6
TX
CK
17 14
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
18 15
I/O ST
I ST
I/O ST
Digital I/O.
EUSART asynchronous receive.
EUSART synchronous data (see related TX/CK).
RE3
— — — — See MCLR/VPP/RE3 pin.
VSS
8, 19 5, 16 P — Ground reference for logic and I/O pins.
VDD
20 17 P — Positive supply for logic and I/O pins.
Legend:
Note 1:
2:
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
Default assignment for CCP2 when Configuration bit, CCP2MX, is set.
Alternate assignment for CCP2 when Configuration bit, CCP2MX, is cleared.
© 2007 Microchip Technology Inc.
Preliminary
DS39689E-page 15