Hi Steve,
Apologies for the delay in my response.
TMS570LS3137 reads and writes data to RAM with MIBSPI5. Can the communicate speed be changed? Is that decided by the Clock (System Clock)?
Reading / writing to the RAM will not affect the speed of the MIBSPI5 communication.
Because as you can see the RAM access will be a single cycle only and with max frequency of 180Mhz.
So, that means to read/write one byte or word from RAM will be happen in the 5.5 nano seconds (1/180Mhz).
Whereas the maximum SPI communication speed is 40 nano seconds that is 25Mhz.
So, to transmit one byte of data at this speed will take (8*40ns), that is 320ns. So, to transmit or receive one byte over MibSPI will take 320nS whereas to read / write from RAM will only take 5.5nS. It is very negligible time as compared with MibSPI speed.
So that means RAM read/write will not affect the MibSPI speed.
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Thanks & regards,
Jagadish.
