Datasheet
© 2009 Microchip Technology Inc. DS39632E-page 3
PIC18F2455/2550/4455/4550
Pin Diagrams (Continued)
PIC18F4455
44-Pin TQFP
44-Pin QFN
PIC18F4455
PIC18F4550
PIC18F4550
10
11
2
3
6
1
18
19
20
21
22
12
13
14
15
38
8
7
44
43
42
41
40
39
16
17
29
30
31
32
33
23
24
25
26
27
28
36
34
35
9
37
RA3/AN3/VREF+
RA2/AN2/V
REF-/CVREF
RA1/AN1
RA0/AN0
MCLR
/VPP/RE3
NC/ICCK
(2)
/ICPGC
(2)
RB7/KBI3/PGD
RB6/KBI2/PGC
RB5/KBI1/PGM
RB4/AN11/KBI0/CSSPP
NC/ICDT
(2)
/ICPGD
(2)
RC6/TX/CK
RC5/D+/VP
RC4/D-/VM
RD3/SPP3
RD2/SPP2
RD1/SPP1
RD0/SPP0
V
USB
RC2/CCP1/P1A
RC1/T1OSI/CCP2
(1)
/UOE
NC/ICPORTS
(2)
NC/ICRST
(2)
/ICVPP
(2)
RC0/T1OSO/T13CKI
OSC2/CLKO/RA6
OSC1/CLKI
V
SS
VDD
RE2/AN7/OESPP
RE1/AN6/CK2SPP
RE0/AN5/CK1SPP
RA5/AN4/SS
/HLVDIN/C2OUT
RA4/T0CKI/C1OUT/RCV
RC7/RX/DT/SDO
RD4/SPP4
RD5/SPP5/P1B
RD6/SPP6/P1C
V
SS
VDD
RB0/AN12/INT0/FLT0/SDI/SDA
RB1/AN10/INT1/SCK/SCL
RB2/AN8/INT2/VMO
RB3/AN9/CCP2
(1)
/VPO
RD7/SPP7/P1D
5
4
10
11
2
3
6
1
18
19
20
21
22
12
13
14
15
38
8
7
44
43
42
41
40
39
16
17
29
30
31
32
33
23
24
25
26
27
28
36
34
35
9
37
RA3/AN3/V
REF+
RA2/AN2/V
REF-/CVREF
RA1/AN1
RA0/AN0
MCLR
/VPP/RE3
RB7/KBI3/PGD
RB6/KBI2/PGC
RB5/KBI1/PGM
RB4/AN11/KBI0/CSSPP
NC
RC6/TX/CK
RC5/D+/VP
RC4/D-/VM
RD3/SPP3
RD2/SPP2
RD1/SPP1
RD0/SPP0
V
USB
RC2/CCP1/P1A
RC1/T1OSI/CCP2
(1)
/UOE
RC0/T1OSO/T13CKI
OSC2/CLKO/RA6
OSC1/CLKI
V
SS
VDD
RE2/AN7/OESPP
RE1/AN6/CK2SPP
RE0/AN5/CK1SPP
RA5/AN4/SS
/HLVDIN/C2OUT
RA4/T0CKI/C1OUT/RCV
RC7/RX/DT/SDO
RD4/SPP4
RD5/SPP5/P1B
RD6/SPP6/P1C
V
SS
VDD
RB0/AN12/INT0/FLT0/SDI/SDA
RB1/AN10/INT1/SCK/SCL
RB2/AN8/INT2/VMO
RB3/AN9/CCP2
(1)
/VPO
RD7/SPP7/P1D
5
4
VSS
VDD
VDD
Note 1: RB3 is the alternate pin for CCP2 multiplexing.
2: Special ICPORT features available in select circumstances. See Section 25.9 “Special ICPORT Features (44-Pin TQFP
Package Only)” for more information.