nRF5340 QSPI IFTIMING->RXDELAY setting

RE: nRF5340 QSPI IFTIMING->RXDELAY setting

Simonr — Mon, 04 Jul 2022 08:14:59 GMT

Hi Kurt

Very sorry about the late reply, but our expert were out of office, so I didn't get any feedback until now. The RXDELAY value should not affect the SCK frequency (only SCKFREQ and prescaling of PCLK192M should), so you should be able to get up to 96MHz with the RXDELAY set to 6.

Best regards,

Simon

RE: nRF5340 QSPI IFTIMING->RXDELAY setting

kpreiss — Wed, 15 Jun 2022 12:23:00 GMT

Simon,

I am asking if it's possible to set the QSPI clock to 24Mhz when RXDELAY is set to 6 and the 192MHz prescaler is set to 1.

Kurt

RE: nRF5340 QSPI IFTIMING->RXDELAY setting

Simonr — Wed, 15 Jun 2022 12:13:58 GMT

Hi Kurt

The RXDELAY is the timing related to sampling of the input serial data. The value of RXDELAY specifies the number of prescaled 192MHz cycles delay from the rising edge of the SCK until the input data is sampled. RXDELAY set to 6 is the reset value which is the most most versatile RXDELAY that suits every frequency except the highest one.

Best regards,

Simon