MCP2517FD datasheet(74/98 Pages) MICROCHIP

74 / 98 page

MCP2517FD

DS20005688B-page 74

 2017-2018 Microchip Technology Inc.

6.0

I/O CONFIGURATION

The IOCON register is used to configure the I/O pins:

• CLKO/SOF: select Clock Output or Start of

Frame.

• TXCANOD: TXCAN can be configured as Push-

Pull or as Open Drain output. Open Drain outputs

allows the user to connect multiple controllers

together to build a CAN network without using a

transceiver.

•INT0 and INT1 can be configured as GPIO with

similar registers as in the PIC microcontrollers or

as Transmit and Receive interrupts.

•INT0/GPIO0/XSTBY can also be used to auto-

matically control the standby pin of the

transceiver.

• INTOD: The interrupt pins can be configured as

open-drain or push/pull outputs.

6.1

Interrupt Pins

The MCP2517FD contains three different interrupt

pins, see Figure 6-1:

•INT is asserted on any interrupt in the CiINT reg-

ister (xIF & xIE), including the RX and TX

interrupts.

•INT1/GPIO1 can be configured as GPIO or RX

interrupt pin (CiINT.RXIF & RXIE).

•INT0/GPIO0 can be configured as GPIO or TX

interrupt pin (CiINT.TXIF & TXIE).

All interrupt pins are active low.

FIGURE 6-1:

INTERRUPT PINS

INT

RX Interrupt

TX Interrupt

Info Interrupt

INT1

INT0

MCP2517FD Datasheet(PDF) 74 Page - Microchip Technology