Hello,
In FLEXSPI the maximum frequency would be 60MHz with the configuration FlexSPIn_MCR0[RXCLKSRC] = 0X0.
yes
I could use DQS pin with another function, is it correct?
If you use the MCR0[RXCLKKSRC] =0, you can use the pin.
But in SEMC, I don't see the maximum frecuency if I use DQS pin with another function, is it ASYNC mode or is ASYNC with DQS pin floating?If it is ASYNC mode, maximum frecuency in write operation would be 200MHz and in read operation (minimum time 7,1ns (setup) + 0ns (hold) ->) 140MHz, is this correct?
Maximum frequency of the module 200MHz.
Best regards,
Pavel
Thank you Pavel for the answer,
In FLEXSPI the maximum frecuency would be 60MHz with the configuration FlexSPIn_MCR0[RXCLKSRC] = 0X0 and I could use DQS pin with another function, is it correct?
But in SEMC, I don't see the maximum frecuency if I use DQS pin with another function, is it ASYNC mode or is ASYNC with DQS pin floating?. If it is ASYNC mode, maximum frecuency in write operation would be 200MHz and in read operation (minimum time 7,1ns (setup) + 0ns (hold) ->) 140MHz, is this correct?
Hello,
In FLEXSPI the maximum frequency would be 60MHz with the configuration FlexSPIn_MCR0[RXCLKSRC] = 0X0.
yes
I could use DQS pin with another function, is it correct?
If you use the MCR0[RXCLKKSRC] =0, you can use the pin.
But in SEMC, I don't see the maximum frecuency if I use DQS pin with another function, is it ASYNC mode or is ASYNC with DQS pin floating?If it is ASYNC mode, maximum frecuency in write operation would be 200MHz and in read operation (minimum time 7,1ns (setup) + 0ns (hold) ->) 140MHz, is this correct?
Maximum frequency of the module 200MHz.
Best regards,
Pavel
But in SEMC, I don't see the maximum frecuency if I use DQS pin with another function, is it ASYNC mode or is ASYNC with DQS pin floating?If it is ASYNC mode, maximum frecuency in write operation would be 200MHz and in read operation (minimum time 7,1ns (setup) + 0ns (hold) ->) 140MHz, is this correct?
Maximum frequency of the module 200MHz.
Regardless of the mode (ASYNC or SYNC) the maximum frecuency is 200MHz for read and write operation?
If I configure MCR[DQSMD] = 0, I could use the pin for another function?
Hello, sorry for the late response, review the information from the datasheet.
Dummy read strobe generated by FlexSPI controller and looped back internally (FlexSPIn_MCR0[RXCLKSRC] = 0x0)
If you use the MCR0 with the internal loop you could use the pin, and the other the maximum of the module is 200 MHz for both operations, but this depends on the capacitance and the length of the pads.
Best regards,
Pavel