Hello, NXP team,
I'm using SPI mode to communicate with MC33772C ,the main board is S32K322,but the response is always like below : 0x00 0x00 0x00 0x00 0xf0 0xB8;
The MOSI is test data ,please ignore , but when I read the registers ,the response is the same;
but the same Code I test in the S32K344 ,it can work normally ;
the power supply is not different, S32K344 board's power is 5V ,and S32K322 is 3.3v ,
Can some please help me?
Thank you very much.
Hello, we encounter the same problem. We always get same response 0x00,0x00,0x00,0x,00,0xF0 0xB8.May I ask in which way the wrong capacitor of Vana/Vpre/Vcp will impact 33772C's response?Thanks a lot
Finally, I found out the reason for this problem, because the hardware engineer cacaously connected the wrong capacitor of Vana/Vpre/Vcp, so the chip could not work properly. This reason is for your reference only
I have the same problem with @KidhRobin
I use the official nxp sample program to wake up 772c and code for it with SPI, the process is
#1 nop = {0, 0, 1244}
#2 wait 500us = {5000, 0, 0}
#3 nop = {0, 0, 1244}
#4 loca write INIT-register = {3, 256, 1660}
It is executed normally in PCB-A
The feedback message code (@ corresponds to #) is
@1= {0, 0, 96}
@3 = {0, 0, 4302}
@4 = {0, 0, 8211}
But in PCB-B all three replies are
{0,0,61624} = {00 00 00 00 F0 8B}
The logic analyzer waveform is shown in the figure
Hello KidhRobin,
I hope all is great with you. Thank you for using the NXP communities.
Messages having less or more than 48 bits, incorrect CRC, or incorrect SCLK phase are disregarded. Communication faults set the COM_ERR_FLT fault bit in the FAULT1_STATUS register and increments the COM_STATUS[COM_ERR_COUNT] register.
Could you please share a detailed description of the bits sent based on the image below? Are you following such procedure?
Note that after a power-up (POR) or RESET (pin) or SYS_CFG1[SOFT_RST], the MC33772C device only responds to the cluster ID of 00 0000b. The user must change the cluster ID of the device by writing a new cluster ID into register INIT[CID].
I hope this information helps.
Regards,
David