DS90UH948-Q1: PLDI is still appeared when Output Enable goes to '0'

Expert 3150 points

Part Number: DS90UH948-Q1
Other Parts Discussed in Thread: DS90UH947-Q1,

Hello Team,

My customer is checking DS90UH947-Q1 and DS90UH948-Q1 working.

at that time, the customer found that OLDI was appeared before OE bit set to '1'.

Customer understands output is asserted by OE bit (Adrs: 0x02 bit:7) is set.

Is this misunderstand?

DS90UH948-Q1 does generate OLDI output before OE bit is asserted?

Best Regards,

Yuki

over 4 years ago

0 Hamzeh Jaradat over 4 years ago

TI__Guru** 109780 points

Hello YY,

You may have L or High Z or invalid signal at the OLDI output. This depends on the status of other pins/register settings. See table 1 in the d/s.

0 YY over 4 years ago in reply to Hamzeh Jaradat

TI__Expert 3150 points

Hello Hamzeh-san,

The customer confirmed the output data is correct data not invalid data.

it seems 948 doesn't work along the datasheet.

Is this 948 broken or the datasheet has incorrect information?

Best Regards,

Yuki

0 Hamzeh Jaradat over 4 years ago in reply to YY

TI__Guru** 109780 points

Hello YY,

is it just a single device or multiple devices?

0 YY over 4 years ago in reply to Hamzeh Jaradat

TI__Expert 3150 points

Hello Hamzeh-san,

I heard customer confirmed one device.

If needed, the customer will check multiple devices.

Best Regards,

Yuki

0 Hamzeh Jaradat over 4 years ago in reply to YY

TI__Guru** 109780 points

Hello Yuki-san,

thanks for the confirmation.

Waiting for the customer's feedback.

0 YY over 4 years ago in reply to Hamzeh Jaradat

TI__Expert 3150 points

Hello Hamzeh-san,

The customer confirmed multiple devices and found same issue.

How do you think?

I got register dump, if you need it, I can send you as email.

Best Regards,

Yuki

0 Hamzeh Jaradat over 4 years ago in reply to YY

TI__Guru** 109780 points

Hello Yuki-san,

can you please tell me what is the sequence or register writes are they using to enable or disable the OLDI output?

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DS90UH948-Q1: PLDI is still appeared when Output Enable goes to '0'