rt1052 xip use nor flash, no dqs pad, How much .serialClkFreq can be set to the maximum

[dasg]

My board use rt1052, and boot from QSPI flash ()and boot from QSPI flash (IS25LP064A).  IS25LP064A data sheet as follow link: https://www.issi.com/WW/pdf/25LP064A.pdf

flash connect to 1052 with FlexspiA, GPIO_SD_B1_06~GPIO_SD_B1_11.

use CE, SCK, IO1~IO4, no DQS pad.

My question is when .readSampleClksrc=kFlexSPIReadSampleClk_LoopbackInternally, How much .serialClkFreq can be set to the maximum? kFlexSpiSerialClk_133MHz or kFlexSpiSerialClk_60MHz, or other value.

const flexspi_nor_config_t hyperflash_config =
{
.memConfig =
{

.readSampleClksrc=kFlexSPIReadSampleClk_LoopbackInternally,

.serialClkFreq = kFlexSpiSerialClk_133MHz, // ?

[jeremyzhou · Accepted solution]

Hi，

Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
1) How much .serialClkFreq can be set to the maximum?
-- It should be 60 MHz when set the readSampleClksrc=kFlexSPIReadSampleClk_Loopback Internally
Have a great day,
TIC

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