TMS5704357BZWTQQ1: SPI clock Frequency calculation

Hi Athun Siva,

Athun Siva said:

Is there any clock frequency table in .xls format for TMS5704357BZWTQQ1. We would like to get the max min values for f(VCLK),  tc(SPC)M etc. to calculate our SPI clock.

We don't have any .xls file for clock frequencies.

You have to refer the datasheet specification tables.

For example, as you can see the below SPI specification table in the datasheet:

So according to above table the Min SPI clock period possible is 40nS, that is equal to the 25Mhz of the maximum frequency.

And max possible period is 256tc(vclk), and there is no max period limitation for vclk

so, there is no limitation for minimum SPI clock frequency. You can even configure 40Khz of SPI clock.

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Thanks & regards,
Jagadish.

Hi Jagadish,

What about the max f(vclk)?  I believe we need that for CS active setup and hold times.  Hope we can make the C2TDELAY and T2CDELAY programmed even the values for 0 so that it depends only on tc(vclk) as per the timing requirements. Any recommended documentation for reference?

Hi Athun Siva,

Athun Siva said:

What about the max f(vclk)?

The max f(vclk) is 110Mhz.

Athun Siva said:

 Hope we can make the C2TDELAY and T2CDELAY programmed even the values for 0 so that it depends only on tc(vclk) as per the timing requirements.

Here are the formula's for C2TDELAY and T2CDELAY

So as mentioned in above formula's, the min value of t C2TDELAY is 2*Vclk if the C2TDELAY =0 and min value of t T2CDELAY= 1*Vclk if the T2CDELAY =0 .

Athun Siva said:

Any recommended documentation for reference?

There are no other reference documentations other than TRM and datasheet.

But if you need example projects then please refer HALCoGen Help Topics.

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Thanks & regards,
Jagadish.