nrf52832 SPI Timing issues--Hisense VR

[Albert Qiu]

Nordic expert,

The customer found several issues when testing SPI timing,

NRF52832 communicates with the master chip, Qualcomm XR2, through SPI, and NRF52832 serves as the slave.

SPI time sequence test found that two items do not meet the requirements of the specification,

please help to have a look.What could have caused the timing error.many thanks.

[Edvin]

Hello,

What numbers am I looking at? The bottom screenshot, is that your measurements? Or is that also from the specification? I will assume that these are your measurements. What application are you running when doing this measurement? Is it one of our examples? Does it do anything other than SPI?

The lines that you have underlined are:

CSN to MISO disabled, which are the same in both documents. 68ns.

CLK edge to MISO valid is a bit higher in the bottom array. Is that your measurements?

BR,
Edvin