• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 46 subscribers
  • Views 232 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

ADS1148: ADS1148 with connecting CS and START pin

Iwata Etsuji
Expert 6400 points
Part Number: ADS1148

Hi team,

This question might be related to historical questions.
But I'd like to confirm; Is it OK to control an ADS1148 with connecting CS and START pin?

Best regards,
Iwata Etsuji

  • 0
    TI__Guru 55232 points

    Hi Etsuji-san,

    To start a conversion, the START pin requires either a high pulse or to be held high to convert continuously. Note that the START pin must be held high to use commands to control conversions.

    The CS pin activates SPI communication. CS must be low before data transactions and must stay low for the entire SPI communication period. When CS is high, the DOUT/DRDY pin enters a high-impedance state. Therefore, reading and writing to the serial interface are ignored and the serial interface is reset.

    Since START must be high and CS must be low for SPI communication, I cannot recommend tying these two pins together.