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Interfacing ADS8361 and STM32F4

Rachid Elkhamsi
Prodigy 10 points
Other Parts Discussed in Thread: ADS8361

Hi all,

i have a problem  interfacing an ADS8361 with a 32-Bit-Microcontroller. I am using an STM32F4 eval-Bord.

I want to use  mode IV, i followed an example, what i found in your website. I use the logic analyser (Logicport), and i couldnt see till now the same results, what i have seen on the example. Did anyone do this befor?

Thank you

Rachid

  • 0
    TI__Guru**** 180751 points

    Hi Rachid,

    I've not used you controller with the ADS8361 before, but I have used the ADS8361 with a standard SPI interface.  The RD and CONVST must be tied together to make this work.  By your LogicPort screen capture, it looks to me like you are using the MOSI to drive CONVST since BUSY is going active.  To get into Mode IV, both M0 and M1 have to be held high.  You can just use pull-ups there or tie them directly to your digital rail.  If you are using GPIO's to control them, set them high and leave them high.  A0 is 'don't care' and only needs to be controlled if you don't plan on using the CHID bits to determine which channel's data you are receiving.  Can you tell us if this is your own board design or if you are using one of our ADS8361 evaluation modules?  If it's your own board design, can you send along a schematic of the connections to the ADS8361?