
PIC24F16KL402 FAMILY
DS31037B-page 16
2011 Microchip Technology Inc.
PGEC1
5252
I/O
ST
ICSP Clock 1
PCED1
4141
I/O
ST
ICSP Data 1
PGEC2
2
19
22
19
I/O
ST
ICSP Clock 2
PGED2
3
20
21
18
I/O
ST
ICSP Data 2
PGEC3
10
7
15
12
I/O
ST
ICSP Clock 3
PGED3
9
6
14
11
I/O
ST
ICSP Data 3
RA0
2
19
2
27
I/O
ST
PORTA Pins
RA1
3
20328
I/O
ST
RA2
7496
I/O
ST
RA3
8
5
10
7
I/O
ST
RA4
10
7
12
9
I/O
ST
RA5
1
18126
I
ST
RA6
14
11
20
17
I/O
ST
RA7
—
19
16
I/O
ST
RB0
4141
I/O
ST
PORTB Pins
RB1
5252
I/O
ST
RB2
6363
I/O
ST
RB3
—
7
4
I/O
ST
RB4
9
6
11
8
I/O
ST
RB5
—
14
11
I/O
ST
RB6
—
15
12
I/O
ST
RB7
11
8
16
13
I/O
ST
RB8
12
9
17
14
I/O
ST
RB9
13
10
18
15
I/O
ST
RB10
—
21
18
I/O
ST
RB11
—
22
19
I/O
ST
RB12
15
12
23
20
I/O
ST
RB13
16
13
24
21
I/O
ST
RB14
17
14
25
22
I/O
ST
RB15
18
15
26
23
I/O
ST
REFO
18
15
26
23
O
—
Reference Clock Output
SCK1
15
12
22
19
I/O
ST
MSSP1 SPI Serial Input/Output Clock
SCK2
18
15
14
11
I/O
ST
MSSP2 SPI Serial Input/Output Clock
SCL1
12
9
17
14
I/O
I2C
MSSP1 I2C Clock Input/Output
SCL2
18
15
7
4
I/O
I2C
MSSP2 I2C Clock Input/Output
SCLKI
10
7
12
9
I
ST
Digital Secondary Clock Input
SDA1
13
10
18
15
I/O
I2C
MSSP1 I2C Data Input/Output
SDA2
2
19227
I/O
I2C
MSSP2 I2C Data Input/Output
SDI1
17
14
21
18
I
ST
MSSP1 SPI Serial Data Input
SDI2
2
19
16
I
ST
MSSP2 SPI Serial Data Input
SDO1
16
13
24
21
O
—
MSSP1 SPI Serial Data Output
SDO2
3
20
15
12
O
—
MSSP2 SPI Serial Data Output
TABLE 1-4:
PIC24F16KL40X/30X FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Function
Pin Number
I/O
Buffer
Description
20-Pin
PDIP/
SSOP/
SOIC
20-Pin
QFN
28-Pin
SPDIP/
SSOP/
SOIC
28-Pin
QFN
Legend:
TTL = TTL input buffer
ST = Schmitt Trigger input buffer
ANA = Analog level input/output
I2C = I2C/SMBus input buffer