Is i.MX6 eCSPI SS_CTL = 0b in slave mode supported?

[satoshishimoda]

Hi community,

I have a question about i.MX6DQ eCSPI.

Please see chapter 21.4.4.2 and chapter 21.7.3 BUST_LENGTH description in IMX6DQRM (Rev.3), these describe eCSPI behavior when SS_CTL is cleared in slave mode.

On the other hand, chapter 21.4.2 says "Slave mode only supports the case when SSCTL (SSB_CTRL[x] bit) is cleared.", and chapter 21.7.4 SS_CTL description says SS_CTL=0 is reserved in slave mode.

Which is correct?

Is SS_CTL=0b in slave mode supported? or not supported?

Best Regards,

Satoshi Shimoda

[Yuri · Accepted solution]

Hello,

  Really the problem is, that  slave mode with unspecified burst length cannot be supported. The burst length

should always be specified with the BURST_LENGTH parameter and the SS_CTL[x] should be set to zero.

Have a great day,
Yuri

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