Hello,
We wish to use S32K144W to collect some ADC data and send then to a 8 bit flash chip. Currently we have a S32K14WEVB-Q064 evaluation board and the Port D 0-7 were chosen to output the 8-bit data. During the experiments I found that the GPIO D.2 and D.3 have a very high delay (almost 17us), which limites the data rate. I tried to write to the PTD->PDOR register and using DMA to move data to that register. Both methods all showed that problem.
The following pictures show the waveform from oscilloscope. The D.2 and D.3 acts incorrectly at high data rate. At low data rate it shows a ~5us delay at rising edge and ~17us delay at falling edge. All other GPIOs act normally. Is there any solution to this?
Thank you,
Caihong
Maybe you can consider the impact on the hardware. The hardware connection of PTD2&PTD3 is different from other ports.
I suggest you replace other ports and test again, or remove the two resistors R659 and R660 and test again
Maybe you can consider the impact on the hardware. The hardware connection of PTD2&PTD3 is different from other ports.
I suggest you replace other ports and test again, or remove the two resistors R659 and R660 and test again
