TUSB2036: Review shcmatic

Jimmy WANG

Genius 4085 points

Part Number: TUSB2036

Tool/software:

Hi team,

Could you help review the schematic? Thanks

Application :1 to 2 docking

0612.PDF

over 1 year ago

0 Brian Zhou over 1 year ago

TI__Guru*** 146735 points

Hi Jimmy:

I'm working on Schematic review and will send my comment by tomorrow.

Regards

Brian

0 Brian Zhou over 1 year ago in reply to Brian Zhou

TI__Guru*** 146735 points

Hi Jimmy:

Here is my comment for the schematic:

, RESET should be conencted to 3.3v

2: for downstream port, other than 15k pulldown, also need 22 ohm in serial and 22pf to ground.

3: also need 22pf cap on upstream port as well.

4: need to use power switch to control downstream port Vbus

BUSPWR is high: self power

EXTMEM is high, EEPROM is disabled

Mode is low: use 6Mhz crystal

Regadrs

brian

0 Jimmy WANG over 1 year ago in reply to Brian Zhou

Genius 4085 points

Hi Brian,

Thanks for your great support. about No.4 commend is must use power switch?

Can customers directly use 5V power supply? Without going through a switch

0 Brian Zhou over 1 year ago in reply to Jimmy WANG

TI__Guru*** 146735 points

Hi Jimmy:

If you directly use 5V, there is no overcurrent protection for downstream ports.

Regards

brian

0 Jimmy WANG over 1 year ago in reply to Brian Zhou

Genius 4085 points

Hi Brian,

Yes, I know. customer uses 5V from another USB device.

So have the OC function on another device. Is it work? right?

+1 Brian Zhou over 1 year ago in reply to Jimmy WANG

TI__Guru*** 146735 points

Hi Jimmy:

If customer knows how to handle overcurrent issue, it should be fine.

Regards

Brian

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TUSB2036: Review shcmatic