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How to choose for read FIFO SPI interface for AD6641?

1 How to choose for read FIFO SPI interface for AD6641? In which register of SPI and what values we need to write?

2 How to choose the SPORT interface? In which register of SPI and what values we need to write?

How to initialize a fill command through the SPI port without standby? In which register of SPI and what values we need to write?

4 How to use bits of the register 0x102?

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  • Hi,

    1 What happens in the AD6641 when bits 2 and 3 entries in the register 102?  These are the SPI controls that are equivelent to the ones described on page 25 for the external signals

    2 Why for Empty signal should be after reading all the words from the FIFO to make 5 more 'empty' (code 0000) reads from the FIFO?  I am not sure about this question, could you clarify?

    3 If AD6641 in a mode slave what can be maximal and minimal SP_SCLK and  SCLK?  The SP_SCLK is for the SPORT, not the SPI.  The max rate for the SPI interface is 40MHz, I do not think there is a minimum.

    4 What bit of the register can be controlled key CML (Figure 26 data sheet)?  We did not expect that there would be any dc coupled applications for this device, but it is possible to disable the dc bias of the Vin+/- by writing 0x04 to register address 0x2C. 


    Regards,

    David



Reply
  • Hi,

    1 What happens in the AD6641 when bits 2 and 3 entries in the register 102?  These are the SPI controls that are equivelent to the ones described on page 25 for the external signals

    2 Why for Empty signal should be after reading all the words from the FIFO to make 5 more 'empty' (code 0000) reads from the FIFO?  I am not sure about this question, could you clarify?

    3 If AD6641 in a mode slave what can be maximal and minimal SP_SCLK and  SCLK?  The SP_SCLK is for the SPORT, not the SPI.  The max rate for the SPI interface is 40MHz, I do not think there is a minimum.

    4 What bit of the register can be controlled key CML (Figure 26 data sheet)?  We did not expect that there would be any dc coupled applications for this device, but it is possible to disable the dc bias of the Vin+/- by writing 0x04 to register address 0x2C. 


    Regards,

    David



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