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PICmicro microcontroller pin out details
Broadly speaking the ranges of PICmicro devices are
designed to be upwards compatible: the pin functions
on an 18-pin device are available on a 28-pin device and
a 40-pin device. This can be seen from the following
18-pin PICmicro
RA2/AN2/Vrefout
1
RA3/AN3/CMP1/Vrefin
2
RA4/T0CKI/CMP2
3
Vpp/RA5/THV/MCLR
4
Vss
5
RBO/INT
6
RB1/RX/DT
7
RB2/TX/CK
8
RB3/CCP1
9
20-pin PICmicro
Vdd
1
RA5/OSC1/CLKIN
2
RA4/AN3/OSC2/CLKOUT
3
RA3/MCLR/Vpp
4
RC5/CCP1/P1A
5
RC4/P1B
6
RC3/AN7/P1C/PGM
7
RC6/AN8/T1OSCO
8
RC7/AN9/SDO/T1OSCO
9
RB7/TX/CK
10
28-pin PICmicro
Vpp/MCLR
1
RA0/AN0
2
RA1/AN1
3
RA2/AN2/Vrl/Vref-
4
RA3/AN3/Vrh/Vref+
5
RA4/T0CKI
6
RA5/AN4/SS/Avdd/Lvdin
7
Vss
8
OSC1/CLKI
9
OSC2/CLKO/T1CKI
10
RC0/T1OSO/CCP2I
11
RC1/T1OS/CCP2I
12
RC2/CCP1
13
RC3/SKC/SCL
14
8
18
RA1/AN1
17
RA0/AN0
16
OSC1/CLKIN/RA7
15
OSC2/CLKOUT/RA6
14
Vdd
13
RB7/T1OSI
12
RB6/T1OSO/T1CKI
11
RB5
10
RB4/PGM
20
Vss
19
RA0/D+/PGD
18
RA1/D-/PGC
17
VUSB
16
RC0/AN4/INTO/VREF+
15
RC1/AN5/INT1/VREF-
14
RC2/AN6/INT2
13
RB4/AN10/SDI/SDA
12
RB5/AN11/RX/DT
11
RB6/SCK/SCL
28
RB7/PGO
27
RB6/PGC
26
RB5
25
RB4
24
RB3/PGM/CCP2
23
RB2/INT2
22
RB1/INT1
21
RB0/INT
20
Vdd
19
Vss
18
RC7/RX/DT
17
RC6/TX/CK
16
RC5/SDO/D+
15
RC4/SKI/SDA/D-
excerpt from the Microchip product selector card. The
following diagram shows the pin out of the various
PICmicro devices:
8-pin PICmicro
Vdd
1
GP5/OSC1/CLKIN
2
GP4/OSC2/AN3/CLKOUT
3
Vpp/GP3/MCLR
4
14-pin PICmicro
Vdd
1
RA5/T1CKI/OSC1/CLKIN
2
RA4/TIG/OSC2/CKLOUT
3
RA3/MCLR/Vpp
4
Rc5
5
Rc4
6
Rc3
7
40-pin PICmicro
MCLR
1
RA0/AN0
2
RA1/AN1
3
RA2/AN2/Vrl/Vref-
4
RA3/AN3/Vrh/Vref+
5
RA4/T0CKI
6
RA5/AN4/SS/Lvdin
7
RE0/AN5/RD
8
RE1/AN6/WR
9
RE3/AN7/CS
10
Avdd
11
Avss
12
OSC1/CLKI
13
OSC2/CLKO/RA6
14
RC0/T1OSO/T1CKI
15
RC1/T1OSVCCP2
16
RC2/CCP1
17
RC3/SCK/SCL
18
RD0/PSP0/C1IN+
19
RD1/PSP1/C1IN-
20
Copyright © 2014 Matrix Technology Solutions Ltd
Note that GP0 maps to RB7
GP1 maps to RB6
GP2/AN2 maps to RA0/AN0
8
Vss
7
GP0/AN0
6
GP1/AN1/Vref
5
GP2/T0CKI/AN2/INT
14
Vss
13
RA0/CIN+/ICSPDAT
12
RA1/CIN-/ICSPCLK
11
RA2/COUT/T0CKI/INT
10
Rc0
9
Rc1
8
Rc2
40
RB7/PGO/KB13
39
RB6/PGC/KB12
38
RB5/KBI1
37
RB4/KBI0
36
RB3/PGM/CCP2/CANRX
35
RB2/INT2/CANTX
34
RB1/INT1
33
RB0/INT0
32
Vdd
31
Vss
30
RD7/PSP7/PD
29
RD6/PSP6/PC
28
RD5/PSP5/PB
27
RD4/PSP4/ECC/PA
26
RC7/RX/DT
25
RC6/TX/CK
24
RC5/SKO/D+
23
RC4/SDI/SDA/D-
22
RD3/PSP3/C2IN
21
RD2/PSP2/C2IN+
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