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Cerebot MX4cK Reference Manual

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The following gives the Pmod connector

position, chipKIT pin number, and

microcontroller port and bit number for the

input capture units input pins:

• IC1 – JH-09, digital pin 54, RD08

• IC2 – JD-03, digital pin 26, RD09

• IC3 – JD-03, digital pin 30, RD10

• IC4 – JE-09, digital pin 38, RD11

• IC5 – JK-09, digital pin 70, RD12

When using the chipKIT MPIDE software, the

symbols PIN_IC1, PIN_IC2, PIN_IC3,

PIN_IC4, and PIN_IC5 can be used to access

the capture input pins.

Use of the input capture units is not currently

supported in the chipKIT MPIDE software. This

will be added in a future version.

External Interrupts

The PIC32 microcontroller provides five

external interrupt inputs. An external interrupt

input can be used to generate an interrupt to

the microprocessor CPU when the pin changes

state. They can be programmed to interrupt on

a rising edge or a falling edge on the pin.

Refer to the PIC32 Family Reference Manual,

Section 8, Interrupts for more information on

the operation of the external interrupts.

These are accessed using the attachInterrupt()

and detachInterrupt() functions when using the

chipKIT MPIDE software,. The interrupt

number is specified using the numbers 0-4, or

preferably, the symbols EXT_INT0 through

EXT_INT4.

The following gives Pmod connector position,

chipKIT pin number, and microcontroller I/O

port and bit number:

• INT0 – JH-08, digital pin 53, RD0

• INT1 – JH-07, digital pin 52, RE8

• INT2 – JE-07, digital pin 36, RE9

• INT3 – JF-01, digital pin 40, RA14

• INT4 – JF-02, digital pin 41, RA15

RTCC

The PIC32 microcontroller contains a low

frequency oscillator and Real Time

Clock/Calendar circuit, RTCC, that can be

used to maintain time and date information.

The operation of the RTCC requires a

32.768Khz frequency source. The crystal X2

position, just above and on the right of the

PIC32 microcontroller, IC1, is provided for the

user to solder in a 32Khz watch crystal. The

Citizen CFS206-32.768KDZF-UB is a crystal

part that can be used in this location.

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