TMS320F28377S: F2837x SPI timing ,datasheet and experiment are not the same

Simen Biao

Expert 1875 points

Part Number: TMS320F28377S

Hi ,

F2837x SPI timing ,datasheet and experiment are not the same.

Which is right ? Any suggest to let experiment result the same as datasheet?

thanks,

SPRS880F, page 155. item no 24 --td(SPCL-STE)M & td(SPCH-STE)M = (0.5tc(SPC) – 3 ) ns .

The actual result is 0 ns as below picture.

Pink: SPICLK , GREEN: SPISTE

SpiaRegs.SPIBRR.bit.SPI_BIT_RATE=99;

ClkCfgRegs.LOSPCP.bit.LSPCLKDIV=2;

CPOL=0;CPHA=1;

CPOL=1;CPHA=1;

best regards,

Simen

over 8 years ago

0 Mark Labbato over 8 years ago

Guru 30330 points

Simen,
I am taking a look at this. I will let you know when I have some information.

Thanks,
mark

0 Simen Biao over 8 years ago in reply to Mark Labbato

Expert 1875 points

Hi Mark,

Any update?

best regards,
Simen

0 Mark Labbato over 8 years ago in reply to Simen Biao

Guru 30330 points

Simen,

I should have a response by the end of the day tomorrow. sorry for the delay.

0 Mark Labbato over 8 years ago in reply to Mark Labbato

Guru 30330 points

Simen,

I wanted to follow up on this post. We have had some internal discussions and I wanted to let you know that we acknowledge that your findings are valid. We are working to updating the datasheet with the proper numbers.

Sorry again for the delay.

0 Simen Biao over 8 years ago in reply to Mark Labbato

Expert 1875 points

Mark,

Thank you.

Simen

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TMS320F28377S: F2837x SPI timing ,datasheet and experiment are not the same