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ADE9000 PCF Register SPI Problem

Question asked by digitaldex on Dec 17, 2017
Latest reply on Dec 19, 2017 by Gary.Kang.AnalogDevices

Hello and first of all sorry for my bad english.

 

I have build a board based on the ADE9000 chip. I am measuring through SCT-013-050 CT (50A In = 1V Out).

The SPI communication in general seems to work just fine. 

But i was wondering why i am getting strange readings from time to time. Right now i am testing with the X_PCF Registers. Every second or third read operation something fails and i get back values far beyond PCF max of 74532013 decimal

 

1 Data HEX: ffff6da0     Data Dec: 4294929824       CRC: c89c

2 Data HEX: 76f80        Data Dec: 487296               CRC: 8bcc

3 Data HEX: 24c10       Data Dec: 150544               CRC: b030

4 Data HEX: fffeea60    Data Dec: 4294896224       CRC: a4ef

5 Data HEX: fff634a0    Data Dec: 4294325408       CRC: e22a

6 Data HEX: fffa70e0    Data Dec: 4294602976       CRC: 1e87

7 Data HEX: 1e8b0       Data Dec: 125104               CRC: 8d30

8 Data HEX: 130070     Data Dec: 1245296             CRC: e064

9 Data HEX: 1670         Data Dec: 5744                   CRC: 5382

 

I can't figure out what the problem is especially because CRC values are right even in those bad readings like 1, 4, 5 or 6. Has anyone the same issues or can help me finding the place where everything goes wrong?

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