TMS320F2808: SPI Master, Characterizing Setup time for SPISOM

Hi Eric,

I am trying to get in contact with our design team to see if we have that data to provide you with. Please give me a few days to do so. I will get back to you as soon as I have an update.

Best Regards,

Marlyn

Thanks Marlyn.

Eric,

The setup time is primarily determined by the load on SPICLK, process and voltage. The die geometry and temperature also play a role, but this is insignificant.

Were you concerned about temperature variation making a difference, or why is the data needed?

Best Regards,

Marlyn

Marlyn,

It appears the setup time in the environment we are running is less than 35ns. I would like to characterize, if possible, the setup time operating at 50C, with a nominal load on the SPI CLOCK and nominal voltage.

Is the voltage dependency on the I/O cell voltage or the core voltage?

Hi Eric,

Eric Mac said:

I would like to characterize, if possible, the setup time operating at 50C, with a nominal load on the SPI CLOCK and nominal voltage.

Unfortunately, we do not have that data to provide you with. We can only ensure that with a setup time of 35ns the device will operate under all possible conditions.

Eric Mac said:

Is the voltage dependency on the I/O cell voltage or the core voltage?

I reached out to the design team. I'll let you know what they say as soon as they get back to me.

Best Regards,

Marlyn