Digilent chipKIT DP32 참조 매뉴얼 - 페이지 11

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Digilent chipKIT DP32에 대해서도 마찬가지입니다: 참조 매뉴얼 (10 페이지)

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12/21/2018

Only MIPDE pin numbers 0 - 3 on the PIC32 microcontroller are 5V tolerant. All other pins are 3.3V tolerant only. To provide 5V

tolerance on those pins, you will have to add clamping diodes and current limiting resistors to those pins. Please check the Pinout

Diagram or Pinout Table to confirm 5V tolerant pins.

The minimum high-voltage output of the PIC32 microcontroller is rated at 2.4V when sourcing 12mA of current. When driving a high

impedance input (typical of CMOS logic) the output high voltage will typically be close to 3.3V. Some 5V devices will recognize this

voltage as a logic high input, and some will not you will have to read the datasheet for the 5V parts you are using to ensure that 3.3V will

satisfy the logic high conditions for the part. Many 5V logic devices will work reliably with 3.3V inputs.

7 Input/Output Connections

The DP32 board provides all 19 I/O pins of the PIC32MX250F128B microcontroller to through-hole points on the PCB.

The PIC32 microcontroller can source or sink a maximum of 7mA on all digital I/O pins. The maximum current that can be sourced or

sunk across all I/O pins simultaneously is +/- 200mA. For more detailed specifications, refer to the PIC32MX1XX/2XX Data Sheet

available from the Microchip web site.

The DP32 uses logical pin numbers to identify digital I/O pins. Pins 0 through 8 are located on J4, counting up from the square pad of

J4. Pins 9 through 18 are located on J3, counting up from the square pad. In addition, several of these I/O pins share functionality with

other devices on the board. See the Pinout Diagram and Pinout Table for more information.

Pins 15 and 16 are shared with the crystal for the internal oscillator, and are not typically usable. Pin 6 is shared with the Analog

Temperature Sensor. Pin 8 is shared with the onboard Potentiometer. Pins 4 and 5 are shared with the USB Data+ and Data- signals. Pin

0 is shared with the USBID function, but removing jumper 1 clears this conflict. Pins 9, 18, 7, and 10 are used for the SPI EEPROM ()

device if it is loaded, on its Chip Select, Master Out/Slave In, Serial Clock, and Master In/Slave Out lines respectively.

In addition to the digital I/O, there are Analog inputs available on the board, called A0 through A8. These pins are shared on digital pins

6 thru 14.

8 Peripheral I/O Functions

I C

Synchronous serial interface. The I C1 interface is available on pins 2 and 3. When using the I C interface, it is necessary to set JP4 and

JP5 such that pullups are present on the bus. This is done by moving the jumper blocks to pins 2 and 3 on each jumper.

User LEDs

Pins 11 (LD4), 12 (LD3), 13 (LD2) and 14 (LD1) are shared between the through-hole connection and the LED (). Driving the pin high

turns the LED () on, driving it low turns it off.

User Buttons

Pins 1 (BTN3) and 17 (BTN2/PGM) are shared between a through-hole connection and a push button. Pushing the button drives the

input high. Releasing it brings the input low.

External Interrupts

Only INT0 is hard-mapped on the microcontroller. It is connected to pin 1. The other external interrupts are accessible via PPS

described below.

Reset

The Reset button is utilized to bring the MCLR pin low on the microcontroller, thus restarting the currently loaded sketch. If the user

wishes to reprogram the device, it is necessary to first hold down BTN2/PGM, and then press the reset button. This forces the

microcontroller to default to the boot loader.

8.1 Peripheral Pin Select

An advanced feature of the PIC32MX1xx/2xx families of microcontrollers is the ability to re-map the locations of peripheral devices.

This advanced feature is available only if you are using Microchip's MPLAB® programming tools. The PPS Assigned Peripheral options

are:

Output Compare

Pin 8 (OC1), Pin 2 (OC2), Pin 3 (OC3), Pin 13 (OC4), Pin 6 (OC5). Output compare allows for the implementation of PWM signals.

Input Capture

Pin 6 (IC1), Pin 11 (IC2), Pin 2 (IC3), Pin 14 (IC4), Pin 13 (IC5). Input capture allows for the synchronization of timers with captured

signals, along with the execution of interrupts.

External Timer Input

Pin 18 (TCK1), Pin 14 (TCK2), Pin 12 (TCK3), Pin 6 (TCK4), Pin 3 (TCK5) allows for timers to be clocked from external sources.

External Interrupt

Pin 3 (INT1 ()), Pin 13 (INT2 ()), Pin 2 (INT3 ()), Pin 17 (INT4) allows for external interrupts to be triggered in their own ISRs.

Interrupts may be edge triggered or level triggered, though only one of rising, falling, high, or low, may be chosen for trigger sensitivity.

https://reference.digilentinc.com/chipkit_dp32/refmanual

chipKIT DP32 Reference Manual [Reference.Digilentinc]

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