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TDC7201: Duo SPI connection at TDC7201

Feng bin Su
Expert 8760 points
Part Number: TDC7201

Hi team,

Customer would like to use our TDC7201 and there is one question about SPI connection. The question is as below. 

    According to TDC7201 spec. saying , it support doubles data read out throughput but requires a second dedicated SPI ....

    Their question is these two DOUT are shared same SCLK and DIN, how to treat the 2nd SPI's SCLK ?  how the 2nd SPI to trigger DOUT data by 1st SPI SCLK ?

  • 0
    TI__Expert 7599 points

    Hello, 

    The SCLK is shared across DOUT1 and DOUT2 however if you notice the chip select is CSB1 and CSB2. By pulling the CSBx low you can configure to enable Ch1 and Ch2 and in regards to reading the data back from DOUt1 and DOUT2 the master controller needs to process the data simultaneously. Typically the master microcontroller has limitations on supporting multiple parallel ports. If the MCU can support simultaneous processing of 2ch reads then the software needs to be controlled to read simultaneous data. Please check with the microcontroller as to how many parallel ports the device can support. 

    let me know if this helps.