Difference between STN1170 and TJA1048

1

Hi,

Is it possible to use STN1170 instead of TJA? STN will offer support for SW and MS CAN as well not just for High Speed…

Thanks,
Vali

2

Those 2 chips play a different role.

The STN1170 is a CAN protocol decoder that takes logic level voltages and decodes CAN messages.

The TJA1048 is a CAN transceiver to convert voltages on the wire to logic level voltages.

In the Carloop, the microcontroller is the CAN protocol decoder. There’s no need for the STN1170.

If you wanted to support SW and MS CAN, you would need to make a new board with additional transceivers to convert to the voltage levels expected by these pins.

Let me know if that makes sense.

3

Hi,

Thanks, it does make sense :).

I’ve already built a prototype on STN1170 and was thinking if i can use the Photon for OTA upgrades mainly.

By the way if i switch the microcontroller with bluz.dk (http://bluz.io/) what other changes should i do to candlestick?

Thanks,
Vali

4

Bluz doesn’t support CAN so you would need an STN1170.