PIC18F2331/2431/4331/4431
Pin Diagrams (Continued)
44-Pin QFN(2)
OSC2/CLKO/RA6
OSC1/CLKI/RA7
VSS
1
2
3
4
5
6
7
8
9
33
32
31
30
29
28
27
26
RC7/RX/DT/SDO
RD4/FLTA(3)
RD5/PWM4(4)
RD6/PWM6
RD7/PWM7
VSS
AVSS
AVDD
VDD
RE2/AN8
RE1/AN7
RE0/AN6
RA5/AN5/LVDIN
RA4/AN4/CAP3/QEB
PIC18F4331
PIC18F4431
VDD
AVDD
RB0/PWM0
RB1/PWM1
RB2/PWM2
25
24
23
10
11
Note 1: RC3 is the alternate pin for T0CKI/T5CKI; RC4 is the alternate pin for SDI/SDA; RC5 is the alternate pin
for SCK/SCL.
2: For the QFN package, it is recommended that the bottom pad be connected to VSS.
3: RD4 is the alternate pin for FLTA.
4: RD5 is the alternate pin for PWM4.
2010 Microchip Technology Inc.
DS39616D-page 7