topic CAN Current Source Capability in S32K

CAN Current Source Capability

bjrajendra — Sat, 23 May 2020 14:10:20 GMT

Hello all,

Currently I'm using S32K14x device. I would like to know the current sink capability of CAN RX Module.

I have seen I/O current sinking capability mentioned as 5mA when used as IO pin as shown below. Will it work same with CAN module of any baud rate.

Kindly help with suitable documents.

Raju

Re: CAN Current Source Capability

danielmartynek — Mon, 25 May 2020 15:41:18 GMT

Hello Raju,

The 5mA sink current applies for output pins only.

The CAN_RX function is an input, it is floating.

Regards,

Daniel

Re: CAN Current Source Capability

bjrajendra — Tue, 26 May 2020 05:15:43 GMT

Hi Daniel,

Thanks for the response.

In fact, we're planning to connect two TJA1050 transceiver IC to one CAN_TX & CAN_RX port. This transceiver IC has an RX terminal in the range of 10mA. Thus is it possible for CAN_RX port to deliver the same.

I may be misunderstood. Kindly guide in meeting the requirement.

Raju.

Re: CAN Current Source Capability

danielmartynek — Tue, 26 May 2020 07:53:26 GMT

Hi Raju,

The RXD pin of the transceiver is an output, it is not an input.

As you can see below, there is a push-pull driver.

Specified as follows:

The RXD pin of the transceiver is connected to the CAN_RX pin of the MCU.

Where the CAN_RX pin is an input driven by the RXD driver.

Regards,

Daniel

Re: CAN Current Source Capability

bjrajendra — Tue, 26 May 2020 10:41:34 GMT

Thanks Daniel for the support.

Raju.