Maximum C6742 EMA_CLK speed for async mode

Randy,

The EMIFA async mode max speed is 148 MHz (6.75 ns). This datasheet is in queue to be updated.

Regards,

Clay

Clay,

That is excellent news.

Will the 148MHz EMA_CLK for async mode require a specific voltage or a certain CPU clock rate?

Will there be an increase to the CPU max clock rate for the C6742, or will it remain at 200MHz?

Regards,
RandyP

Randy,

At CVDD=1.2V, EMIFA async mode max speed is 6.75 ns (148 MHz).

At CVDD=1.1V, EMIFA async mode max speed is 15 ns (66.6 MHz).

At CVDD=1.0V, EMIFA async mode max speed is 20 ns (50 MHz).

The clock divider used to drive the clock domain for the EMIFA uses integer divide values, so you would either have to run the CPU at 148 to get the EMIF at 148 MHz (/1), or you could run the CPU at 200 MHz and run the EMIFA at 100 MHz (/2).

C6742 will remain specified for a max CPU clock speed of 200 MHz.

Regards,

Clay

Clay,

Would it also be an option on the C6742 to set the PLL frequency at 600MHz, use POSTDIV=/3 for SYSCLK1=200MHz and then use the /4.5 for EMA_CLK=133MHz? Just in case 90% EMIFA is better for someone than 75% DSP?

Regards,
RandyP

Randy,

Yes, that would be an option also.

Regards,

Clay