topic Re: TJA1145T/FD in NXP Designs

TJA1145T/FD

fanshichencao — Sun, 05 Apr 2020 15:27:23 GMT

I have two question about TJA1145T/FD to ask for help

1.What's the meaning of FD-Active and FD-paaive as shown marked in the figure below?

2.How to configure to achieve 2Mbit/s？

I find the Max Data rate is 1000kbit/s in register.But datasheet .What is written in the data sheet is up to 2Mbit/s.

How to achieve the 2 Mbits data rate?

Re: TJA1145T/FD

PetrS — Mon, 06 Apr 2020 20:00:19 GMT

Hi,

1) FD-active node (MCU+transceiver) can simply do CAN FD communication.

FD-passive functionality is the ability to ignore CAN FD frames while waiting for a valid wake-up frame in Sleep/Standby mode. This feature of partial networking is useful on networks that support both CAN FD and standard CAN 2.0 communications. It allows normal CAN controllers that do not need to communicate CAN FD messages to remain in partial networking Sleep/Standby mode during CAN FD communication without generating bus errors.

2) This register is for partial networking configuration. In normal active mode TJA1145 enables reliable communication in the CAN FD fast phase at data rates up to 2 Mbit/s. No configuration is needed.

BR, Petr

Re: TJA1145T/FD

fanshichencao — Sat, 18 Apr 2020 23:27:35 GMT

Thank you very much!