TUSB8041: TUSB8041IRGCR

Seungman Son

Part Number: TUSB8041

Tool/software:

Hi Brian,

we are having trouble again with the TUSB8041 not being recognized during power cycle testing.

You told me before that TEST pin is grounded, but our product, that pin is open.

What problem will occur when TEST pin is open?

0 Brian Zhou 11 months ago

Hi Seungman:

There is internal pulldown, so Test pin may not issue.

Can you take waveform for 3.3v/1,1v/Grst signal? how often the issue happens?

Best

Brian

0 Seungman Son 11 months ago in reply to Brian Zhou

please see the picture below. This issue happens irregularly. Customers say it happens about once every 50 cycles.

0 Brian Zhou 11 months ago in reply to Seungman Son

Can you send schematic again?

Can customer adjust GRSTz signal?

Best

Brian

0 Seungman Son 10 months ago in reply to Brian Zhou

please see the schematic for TUSB8041. we cannot adjust the GRSTz signal.

we changed GRSTz sequence as follows. 1.1V is delayed than before due to other issue, is it no problem?

0 Brian Zhou 10 months ago in reply to Seungman Son

Hi Seungman:

New power on waveform should be ok.

Can customer connect USB_Vbus to host Vbus thought 90k/10k divider?

Best

Brian

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