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ADS8353-Q1: How to connect ADS8353's SPI interface with MCU

Gary Zeng
Intellectual 1105 points
Part Number: ADS8353-Q1
Other Parts Discussed in Thread: ADS8353, ADS8353Q1EVM-PDK

Tool/software:

Hi TI experts,

My customer want to use ADS8353 for two current sensing and they have already getten the ADS8353Q1EVM-PDK.

ADS8353 has two data output IO(SDO) of SPI interface. One is SDO_A can output the data of both Channel A and Channel B. But it will decease the data rate. Another is SDO_B, which can only output the data of Channel.

How can Customer connect SDO_B pin to MCU. If Customer has already connected SPI_CLK/CSn/SDI/SDO_A to MCU's SPI1.

1. Connect SDO_B to any GPIO of MCU

2. Only connect SDO_B to MCU's SPI2_SDO

2. Connect SPI_CLK/CSn/SDI/SDO_B to MCU's SPI2

Which one is corrct?

  • 0
    TI__Expert 3430 points

    Hello Gary, 

    That depends on the MCU's GPIO capabilities and the mode enabled. Most of these options should work if MCU is capable. 

    Typically I would recommend using 2, but having a way of sharing the SCLK with both SPI cores might be required as well. 

    Best regards, 

    Yolanda