C6657 SPI chip Select at SPI Boot

kenshow

Hi,

I have a question about SPI chip selector in SPI boot with C6657.
Please let me know the relation of 7-8 bit field in SPI Device configuration and SPISCx pins.

The relations are as follows aren’t them?

Bit7： SPISCS0
Bit8： SPISCS1

Regards,
Kenshow

over 11 years ago

0 Bill Taboada over 11 years ago

TI__Mastermind 42545 points

Hi Kenshow,

You are correct in your assumption. The mapping is shown below.

00: CS0 and CS1 are both active - do not used

10: CS0 is active

01: CS1 is active

11: No one is active

Regards, Bill

0 kenshow over 11 years ago in reply to Bill Taboada

Genius 3725 points

Thanks Bill,

The bit order is Bit7:8 or Bit8:7?

0 0 : CS0 and CS1 are both active - do not used
1 0 : CS0 is active
0 1 : CS1 is active
1 1 : No one is active

Regards
Kenshow

0 Bill Taboada over 11 years ago in reply to kenshow

TI__Mastermind 42545 points

Hi Kenshow,

Sorry for the missing detail.

B8 B7 : chip select used

0 0 : CS0 and CS1 are both active - do not used
1 0 : CS0 is active
0 1 : CS1 is active
1 1 : Neither is active

Regards, Bill

0 kenshow over 11 years ago in reply to Bill Taboada

Genius 3725 points

Hi Bill,

Thank you for your useful information. I understood.

Regards,
Kenshow

0 BrandonAzbell over 11 years ago in reply to Bill Taboada

TI__Guru 63710 points

Is this update to the datasheet planned to add the necessary detail?

0 Steven Ji over 11 years ago in reply to BrandonAzbell

TI__Genius 12065 points

Brandon,

We plan to update the SPI chip select field as follows based on Bill's response in the next release of the data manual.

Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

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C6657 SPI chip Select at SPI Boot