ATSAMC21J18A dual CAN

[ziehao]

Hi all.

I am currently working on the ATSAMC21J series of MCUs, and I read that it has Dual independent CAN controllers as stated in
http://ww1.microchip.com/downloads/en/AppNotes/Atmel-42464-SAMC21-CAN-BUS-Firmware_ApplicationNote_AT6493.pdf

My question is what exactly does this mean? Is it able to connect to 2 different CANBUS and perform Transmit and Receive functions at the same time and not interfere with each other?

Thanks in advance!!

[Rerouter]

Correct, Though you usually wouldn't need 2 independent transceivers n the same bus, as your code would usually be much faster than the canbus data

Normal applications might be hooking into 2 independant canbus networks, either using the data from both or acting as a gateway.

[ziehao]

Correct, Though you usually wouldn't need 2 independent transceivers n the same bus, as your code would usually be much faster than the canbus data

Normal applications might be hooking into 2 independant canbus networks, either using the data from both or acting as a gateway.

Thanks!!

Another question, though it is not about the CAN module. Not sure if I will need to pose this question in another topic?
The datasheet says the ATSAMC21J18 MCU has 6 SERCOM interface. Am I able to use 2 of the SERCOM as USART? Or in an extreme case, all 6 as USART?

[JPortici]

yes.

Citing from the datasheet (2016 version)

31. SERCOM – Serial Communication Interface

31.1. Overview

There are up to six instances of the serial communication interface (SERCOM) peripheral.
A SERCOM can be configured to support a number of modes: I2C, SPI, and USART. When SERCOM is
configured and enabled, all SERCOM resources will be dedicated to the selected mode.
The SERCOM serial engine consists of a transmitter and receiver, baud-rate generator and address
matching functionality. It can use the internal generic clock or an external clock to operate in all sleep
modes.

I was evaluating it 2 years ago for a product that would need to gather data from two networks and communicate only in one of the two. It was rather easy to set up despite ASF (altough i abandoned it quickly to write directly to registers for setup)

[ziehao]

yes.

Citing from the datasheet (2016 version)

31. SERCOM – Serial Communication Interface

31.1. Overview

There are up to six instances of the serial communication interface (SERCOM) peripheral.
A SERCOM can be configured to support a number of modes: I2C, SPI, and USART. When SERCOM is
configured and enabled, all SERCOM resources will be dedicated to the selected mode.
The SERCOM serial engine consists of a transmitter and receiver, baud-rate generator and address
matching functionality. It can use the internal generic clock or an external clock to operate in all sleep
modes.

I was evaluating it 2 years ago for a product that would need to gather data from two networks and communicate only in one of the two. It was rather easy to set up despite ASF (altough i abandoned it quickly to write directly to registers for setup)

I see. Thank you very much!!