PIC18F4321 Datasheet, PDF (16/396 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
PORTB is a bidirectional I/O port. PORTB can be software
programmed for internal weak pull-ups on all inputs.
RB0/INT0/FLT0/AN12 21 18
RB0
I/O TTL Digital I/O.
INT0
I ST
External interrupt 0.
FLT0
I ST
PWM Fault input for CCP1.
AN12
I Analog Analog input 12.
RB1/INT1/AN10
RB1
INT1
AN10
22 19
I/O TTL Digital I/O.
I ST External interrupt 1.
I Analog Analog input 10.
RB2/INT2/AN8
RB2
INT2
AN8
23 20
I/O TTL Digital I/O.
I ST External interrupt 2.
I Analog Analog input 8.
RB3/AN9/CCP2
RB3
AN9
CCP2⁽²⁾
24 21
I/O TTL Digital I/O.
I Analog Analog input 9.
I/O ST Capture 2 input/Compare 2 output/PWM 2 output.
RB4/KBI0/AN11
RB4
KBI0
AN11
25 22
I/O TTL Digital I/O.
I TTL Interrupt-on-change pin.
I Analog Analog input 11.
RB5/KBI1/PGM
RB5
KBI1
PGM
26 23
I/O TTL Digital I/O.
I TTL Interrupt-on-change pin.
I/O ST Low-Voltage ICSP™ Programming enable pin.
RB6/KBI2/PGC
RB6
KBI2
PGC
27 24
I/O TTL Digital I/O.
I TTL Interrupt-on-change pin.
I/O ST In-Circuit Debugger and ICSP programming clock pin.
RB7/KBI3/PGD
RB7
KBI3
PGD
28 25
I/O TTL Digital I/O.
I TTL Interrupt-on-change pin.
I/O ST In-Circuit Debugger and ICSP programming data pin.
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.
DS39689E-page 14
Preliminary
© 2007 Microchip Technology Inc.