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DAC8742HEVM: read/write the Low Level Configuration in GUI

Part Number: DAC8742HEVM
Other Parts Discussed in Thread: DAC8741H


After the discussion of below post, I can read and write the PAFF in High Level Configuration of GUI, in DAC8742HEVM.  But in Low Level Configuration, I didn't see the register value of Reg_0x23 and Reg_0x24 is what I read and write. How to write/read date to PAFF through register? Because I will access DAC8741H through SPI of MCU in customer's project, I would like to know how to configure registers for PAFF write and read.


  • Hi Jerry,

    You can write to FIFO_D2M by setting the bits in this window. As soon as the DATA portion of the register FIFO_D2M[7:0] is written the device will start transmitting the FF/PA waveform. So you can only send one byte at a time unless you disable the TX/RX of the modem, then fill the FIFO, and re-enable TX/RX.

    FIFO_M2D can be read in the same way as on the high-level GUI. Each time you click Read Selected/Read All you will see the next byte in the receive FIFO.

    I think it is more practical to read these from the high-level GUI but either way works.