DS90UB914A-Q1: Watch Dog Timer

Shuji Ishiwata

Mastermind 8230 points

Part Number: DS90UB914A-Q1

Hi All,

I have a question about DS90UB914A-Q1.

Is the Watch Dog Timer at Address 0x20 the same as the I2C Bus Timer at Address 0x22?

Best Regards,
Ishiwata

over 5 years ago

0 Jiashow Ho over 5 years ago

TI__Genius 11340 points

Hi Ishiwata,

Please give me a couple of days to find this out for you.

Best,

Jiashow

0 Shuji Ishiwata over 5 years ago in reply to Jiashow Ho

Mastermind 8230 points

Hi Jiashow

Thank you for your reply.
I will waiting for your message.

Best Regards,
Ishiwata

0 Jiashow Ho over 5 years ago in reply to Shuji Ishiwata

TI__Genius 11340 points

Hi Ishiwata-san,

Reg 20 is for remote I2c through bidirectional Control channel

Reg 22 is for local I2C

0 Shuji Ishiwata over 5 years ago in reply to Jiashow Ho

Mastermind 8230 points

Hi Jiashow

Thank you for your reply.
I have a question with the register contents at 0x20.

How does it work when it timeout?
At the timeout, the stop condition cannot be issued, probably because it is a clock stretch. Therefore, communication freezes.
I'd like to put timeouts on a regular basis and stop I2C communication on the way. Is it possible with 0x20 watch dog?

Best Regards,
Ishiwata

0 Jiashow Ho over 5 years ago in reply to Shuji Ishiwata

TI__Genius 11340 points

Hi Ishiwata-san,

I'm not sure if I understand your question? When the watchdog timer times out, it will terminate the current transaction.

Best,

Jiashow

0 Shuji Ishiwata over 5 years ago in reply to Jiashow Ho

Mastermind 8230 points

Hi Jiashow-san

Thank you for your reply.

I wanted to ask if there was any action after the transaction finished.
Is there action to reset the slave ?

Best Regards,
Ishiwata

0 Jiashow Ho over 5 years ago in reply to Shuji Ishiwata

TI__Genius 11340 points

Hi Ishiwata-san,

Once the transaction terminates, you would be able to send another transaction.

Jiashow

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DS90UB914A-Q1: Watch Dog Timer