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ADS8681: multiSPI and RVS pin

Yuta Nishie
Genius 4925 points
Part Number: ADS8681

Tool/software:

Hi,

1. Please tell me which registers the user needs to set in order to use multiSPI. Also, please tell me if there are any documents that describe the registers in detail.

2. I understand that it is possible to detect the completion of AD conversion by checking the RVS pin by using the multiSPI function. Please tell me if there are any documents that describe how to use the RVS pin and the internal registers required to use it.

Best Regards,

Nishie

  • +1
    TI__Guru**** 180771 points

    Hi Nishie,

    For Q1 - see section 7.5.4.2.2 "Legacy, SPI-Compatible (SYS-xy-S) Protocols With Dual SDO-x The device provides an option to increase the SDO-x bus width from one bit (default, single SDO-x) to two bits (dual SDO-x) when operating with any of the data transfer protocols. In order to operate the device in dual SDO mode, the SDO1_CONFIG[1:0] bits in the SDO_CTL_REG register must be set to 11b. In this mode, the ALARM/SDO-1/GPO pin functions as SDO-1."  Section 7.6 is where you can find details on the various registers.

    For Q2 - there is nothing special that you need to do for the RVS output pin - simply connect it to an interrupt pin on your controller and set that up to wait for an active high pulse from the ADS8681.