How to set the TJA1100 in test mode?

[jerrry]

Hi,

I ve read about setting the TJA1100 in different test modes. But how can I do this?

Is there any strapping I can use or do I connet the PHY to any device for programming the testmode?

Obviously there is an tutorial you can show/give me?

Regards Jerome

[TomasVaverka]

Hi Jerome,

The TJA1100 provides five different test modes which can be selected by the extended control bits [8:6]:

A detailed description can be found in the TJA1100 data sheet (page 17). To run a test mode, the TJA1100 must be in Normal mode and LINK_CONTROL must be disabled. In test modes 1-4 the EN pin is reconfigured as output and signals the TX_TCLK clock signal.

Hope it helps.

Best regards,

Tomas

[jerrry]

Hi Thomas,

thank you alot. Exactly what I was looking for.

- Do I have to set the modes during startup or do I set the PHY in the test mode while the PHY is in normal mode?

- For the TX_TCLK I have to use the EN pin as CLK-source. Correct?

Best Regards and thank you for your help.

Jérôme