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How does the FRSTDATA operation function for the AD7606B (2 SDO 4-Wire) ?

AD7606B

Configuration: 2 SDO 4-Wire

No. of SCLK

64

LSB CLK out

63rd SCLK rising edge

1st FRSTDATA

CSb falling edge to 16th SCLK falling edge

2nd FRSTDATA

No 2nd pulse

 

We can see here in Figure 2., every first set of data that will be released for the AD7606B triggers the FRTSDATA pin one time only even though the next set of data will repeat again. This time it has 2 SDO DoutA and DoutB but it doesn’t change the response. Still, the FRSTDATA specifically triggers from CSb falling edge till the 16th SCLK falling edge with 64 pulses of SCLK. As we can see in the orange box, there is no FRSTDATA pulse from the incoming data set even though the next set of data will arrive. 

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