Microchip Technology MA330020 Data Sheet

 2008-2014 Microchip Technology Inc.

DS70000318G-page 19

AN0-AN11

I

Analog

No

Analog input channels

CLKI

CLKO

I

O

ST/CMOS

—

No

No

External clock source input. Always associated with OSC1 pin 
function.
Oscillator crystal output. Connects to crystal or resonator in Crystal 
Oscillator mode. Optionally functions as CLKO in RC and EC 
modes. Always associated with OSC2 pin function.

OSC1

OSC2

I

I/O

ST/CMOS

—

No

No

Oscillator crystal input. ST buffer when configured in RC mode; 
CMOS otherwise.
Oscillator crystal output. Connects to crystal or resonator in Crystal 
Oscillator mode. Optionally functions as CLKO in RC and EC 
modes.

CN0-CN29

I

ST

No

Change Notification inputs. Can be software programmed for 
internal weak pull-ups on all inputs.

IC1-IC2

I

ST

Yes

Capture Inputs 1/2.

OCFA
OC1-OC2

I

O

ST

—

Yes
Yes

Compare Fault A input (for Compare Channels 1 and 2)
Compare Outputs 1 through 2.

INT0
INT1
INT2

I
I
I

ST
ST
ST

No

Yes
Yes

External Interrupt 0.
External Interrupt 1.
External Interrupt 2.

RA0-RA4

I/O

ST

No

PORTA is a bidirectional I/O port.

RB0-RB15

I/O

ST

No

PORTB is a bidirectional I/O port.

RC0-RC13

I/O

ST

No

PORTC is a bidirectional I/O port.

RP0-RP29

I/O

ST

No

Remappable I/O pins.

T1CK
T2CK
T3CK

I
I
I

ST
ST
ST

Yes
Yes
Yes

Timer1 external clock input.
Timer2 external clock input.
Timer3 external clock input.

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.

SCK1
SDI1
SDO1
SS1

I/O

I

O

I/O

ST
ST

—

ST

Yes
Yes
Yes
Yes

Synchronous serial clock input/output for SPI1.
SPI1 data in.
SPI1 data out.
SPI1 slave synchronization or frame pulse I/O.

SCL1
SDA1

I/O
I/O

ST
ST

No
No

Synchronous serial clock input/output for I2C1.
Synchronous serial data input/output for I2C1.

TMS
TCK
TDI
TDO

I
I
I

O

TTL
TTL
TTL

—

No
No
No
No

JTAG Test mode select pin.
JTAG test clock input pin.
JTAG test data input pin.
JTAG test data output pin.

Legend: CMOS = CMOS compatible input or output

Analog = Analog input

I = Input

ST = Schmitt Trigger input with CMOS levels

P = Power

O = Output

TTL = Transistor-Transistor Logic

PPS = Peripheral Pin Select