TUSB9261 can not be working

qiang xiang

Intellectual 290 points

Other Parts Discussed in Thread: TUSB9261, TPS54228

We use TUSB9261 to achieve Sata to USB3.0. But we find Tusb9261 is not working .

Tusb9261 don't send out the SPI_CS/ SPI _SCLK signals to Load firmware from SPI Flash.

1.1V and 3.3v has beeen powered , and 1.1v is earlier than 3.3v.

25Mhz Crystal works well.

But TUSB9261 is still not working.

Can you give me some advice? Thank you .

over 7 years ago

0 Elias Villegas M. over 7 years ago

TI__Guru* 76130 points

Hello,
We need to review your schematic, please share it.
Regards

0 qiang xiang over 7 years ago in reply to Elias Villegas M.

Intellectual 290 points

Dear Elias,

Thanks for your reply , attached is my Schematic of TUSB9261.

The 1.1V VDD and 3.3V VDDA33 are provided by two pcs of tps54228 . They are on another page.

if you need this , I will send you again.

And GRSTZ is controller by one GPIO.

Please help me check . Thanks again.

schematic TUSB9261.pdf

0 qiang xiang over 7 years ago in reply to qiang xiang

Intellectual 290 points

Hi, Elias,

I have replace my Flash with EVM'S flash , the evm's flash version is 1.05. It works well on EVM when I plug the EVM into PC.

But on my board with EVM'S flash, TUSB9261 read the Flash again and again.

I can see the wave of the cs# pin and SCLK pin of the flash, the flash does been read again and again .

Can you give me some advice ?

TXS

0 Elias Villegas M. over 7 years ago in reply to qiang xiang

TI__Guru* 76130 points

Hello,
In your board, is the tUSB9261 connected to a USB connector?
If so, you need to remove C4607 and C4608

The datasheet specifies FREQSEL[1:0]=11 and to use a 40MHz oscillator.

Regards

0 qiang xiang over 7 years ago in reply to Elias Villegas M.

Intellectual 290 points

Elias,

Thanks for your reply. I have got the reason, We used the wrong FW. Thanks again.

Interface

Interface forum

TUSB9261 can not be working