MCP2518FD datasheet(74/96 Pages) MICROCHIP

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MCP2518FD

DS20006027A-page 74

 2019 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 con-

trollers 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 automati-

cally control the standby pin of the transceiver.

• INTOD: The interrupt pins can be configured as

open-drain or push/pull outputs.

6.0.1

INTERRUPT PINS

The MCP2518FD device contains three different

interrupt pins, see Figure 6-1:

•INT is asserted on any interrupt in the CiINT

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

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