topic Re: TJA1101 force sleep in S32K

TJA1101 force sleep

JUNJIECHANG — Fri, 13 Nov 2020 05:56:12 GMT

I'm testing the sleep mode of TJA1101. After I put it to sleep through the forced sleep command, I tried to use the command to put it into standby mode, but it didn't work. How can I get it out of sleep mode?

The device can be switched to Sleep by setting the FORCE_SLEEP=1. Note that this
command would turn the PHY to sleep mode immediately if it is not already in Sleep.

Re: TJA1101 force sleep

Bulat — Mon, 16 Nov 2020 12:05:09 GMT

Do you remove power from the chip when entering into sleep mode?

If you read register #17 during sleep, what value it returns?

Regards,

Bulat

Re: TJA1101 force sleep

JUNJIECHANG — Tue, 17 Nov 2020 02:40:03 GMT

First of all thanks for your reply!

I don't remove power form the chip when entering into sleep mode, and the value of the register #17 during sleep readed is 0x5000.

Now we use TC37x control the TJA1101, and use the INH pin control connect to TLF35584 WAK pin, so when I want to power off the controller, I must first put the PHY into sleep mode. But when I put the PHY into Sleep mode through the Fource Sleep command, the PHY chip cannot be activated by the activity detected signal of the bus. What should I do (the WAKE_IN_OUT pin is not connected to the hardware)?

Looking forward to your reply!

Re: TJA1101 force sleep

Bulat — Tue, 17 Nov 2020 10:25:52 GMT

Can you read the value of register #18 before entering into sleep?

Re: TJA1101 force sleep

JUNJIECHANG — Sat, 21 Nov 2020 04:02:30 GMT

I can read the value of register #18 before entering into sleep,it is 0x5E05.

Re: TJA1101 force sleep

JUNJIECHANG — Sat, 21 Nov 2020 04:03:22 GMT

Looking forward to your reply!