Datasheet
2013-2014 Microchip Technology Inc. DS70000689D-page 17
dsPIC33EPXXXGM3XX/6XX/7XX
U1CTS
U1RTS
U1RX
U1TX
I
O
I
O
ST
—
ST
—
Yes
Yes
Yes
Yes
UART1 Clear-to-Send.
UART1 Ready-to-Send.
UART1 receive.
UART1 transmit.
U2CTS
U2RTS
U2RX
U2TX
I
O
I
O
ST
—
ST
—
Yes
Yes
Yes
Yes
UART2 Clear-to-Send.
UART2 Ready-to-Send.
UART2 receive.
UART2 transmit.
U3CTS
U3RTS
U3RX
U3TX
I
O
I
O
ST
—
ST
—
Yes
Yes
Yes
Yes
UART3 Clear-to-Send.
UART3 Ready-to-Send.
UART3 receive.
UART3 transmit.
U4CTS
U4RTS
U4RX
U4TX
I
O
I
O
ST
—
ST
—
Yes
Yes
Yes
Yes
UART4 Clear-to-Send.
UART4 Ready-to-Send.
UART4 receive.
UART4 transmit.
SCK1
SDI1
SDO1
SS1
I/O
I
O
I/O
ST
ST
—
ST
No
No
No
No
Synchronous serial clock input/output for SPI1.
SPI1 data in.
SPI1 data out.
SPI1 slave synchronization or frame pulse I/O.
SCK2
SDI2
SDO2
SS2
I/O
I
O
I/O
ST
ST
—
ST
Yes
Yes
Yes
Yes
Synchronous serial clock input/output for SPI2.
SPI2 data in.
SPI2 data out.
SPI2 slave synchronization or frame pulse I/O.
SCK3
SDI3
SDO3
SS3
I/O
I
O
I/O
ST
ST
—
ST
Yes
Yes
Yes
Yes
Synchronous serial clock input/output for SPI3.
SPI3 data in.
SPI3 data out.
SPI3 slave synchronization or frame pulse I/O.
SCL1
SDA1
ASCL1
ASDA1
I/O
I/O
I/O
I/O
ST
ST
ST
ST
No
No
No
No
Synchronous serial clock input/output for I2C1.
Synchronous serial data input/output for I2C1.
Alternate synchronous serial clock input/output for I2C1.
Alternate synchronous serial data input/output for I2C1.
SCL2
SDA2
ASCL2
ASDA2
I/O
I/O
I/O
I/O
ST
ST
ST
ST
No
No
No
No
Synchronous serial clock input/output for I2C2.
Synchronous serial data input/output for I2C2.
Alternate synchronous serial clock input/output for I2C2.
Alternate synchronous serial data input/output for I2C2.
TMS
TCK
TDI
TDO
I
I
I
O
ST
ST
ST
—
No
No
No
No
JTAG Test mode select pin.
JTAG test clock input pin.
JTAG test data input pin.
JTAG test data output pin.
TABLE 1-1: PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin
Type
Buffer
Type
PPS Description
Legend: CMOS = CMOS compatible input or output Analog = Analog input P = Power
ST = Schmitt Trigger input with CMOS levels O = Output I = Input
PPS = Peripheral Pin Select TTL = TTL input buffer
Note 1: This pin is not available on all devices. For more information, see the “Pin Diagrams” section for pin
availability.
2: AV
DD must be connected at all times.