Datasheet

2010-2015 Microchip Technology Inc. DS40001303H-page 7
PIC18F2XK20/4XK20
TABLE 2: 40/44-PIN ALLOCATION TABLE (PIC18F4XK20)
I/O
40-Pin PDIP
40-Pin UQFN
44-Pin TQFP
44-Pin QFN
Analog
Comp.
Reference
ECCP
EUSART
MSSP
Timers
Slave
Interrupts
Pull-up
Basic
RA0 2 17 19 19 AN0 C12IN0
-
RA1 3 18 20 20 AN1 C12IN1
-
————
RA2 4 19 21 21 AN2 C2IN+ VREF-/
CV
REF
RA3 5 20 22 22 AN3 C1IN+ V
REF+—
RA4 6 21 23 23 C1OUT T0CKI
RA5 7 22 24 24 AN4 C2OUT HLVDIN
——
SS
——
RA6 14 29 31 33 OSC2/
CLKOUT
RA7 13 28 30 32 OSC1/
CLKIN
RB0 33 8 8 9 AN12 FLT0 INT0 Yes
RB1 34 9 9 10 AN10 C12IN3
-
————INT1Yes
RB2 35 10 10 11 AN8 INT2 Yes
RB3 36 11 11 12 AN9 C12IN2
-
CCP2
(1)
—— Yes
RB4 37 12 14 14 AN11 KBI0 Yes
RB5 38 13 15 15 KBI1 Yes PGM
RB6 39 14 16 16 KBI2 Yes PGC
RB7 40 15 17 17 KBI3 Yes PGD
RC0 15 30 32 34 T1OSO/
T13CKI
RC1 16 31 35 35 CCP2
(2)
——T1OSI
RC2 17 32 36 36 CCP1/
P1A
RC3 18 33 37 37 SCK/
SCL
——
RC4 23 38 42 42 SDI/
SDA
RC5 24 39 43 43 SDO
RC6 25 40 44 44 TX/
CK
RC7 26 1 1 1 RX/
DT
——
RD0 19 34 38 38 PSP0
RD1 20 35 39 39 PSP1
RD2 21 36 40 40 PSP2
RD3 22 37 41 41 PSP3
RD4 27 2 2 2 PSP4
RD5 28 3 3 3 P1B PSP5
RD6 29 4 4 4 P1C PSP6
Note 1: CCP2 multiplexed with RB3 when CONFIG3H<0> = 0
2: CCP2 multiplexed with RC1 when CONFIG3H<0> = 1
3: Input-only.