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DRV8910-Q1: Question about the bridge channel selection?

Shuai Fan
Genius 13451 points
Part Number: DRV8910-Q1

Hi expert!

As we know, this device can support 12 half-bridge and 6 full-bridge.

My question is:

1. how to determine and control the each  specific channel?

For example, if I want to control the channel n, should I send the address of channel n by SPI? If so, could you show me the page that contain the address table of each channel? Actually, I read DS many times but still can't find it.

2. Can I understand that this device use the daisy chain method internal channel selection? 

3. If I want to use daisy chain for multi DRV89XX control, can I understand below is a big daisy chain for external DRV89XX selection and each DRV89XX has its own small daisy chain structure?

BR

Shuai

  • 0
    TI__Genius 12100 points

    Hi Shuai,

    Yes, the devices feature standard 16-bit, 5-MHz serial peripheral interface (SPI) with daisy chain capability for complete configuration and detailed diagnostics.

    Shuai Fan said:
    1. how to determine and control the each  specific channel?

    Section 8.6 of the datasheet covers register maps and bit descriptions as well as addresses that can be sent over SPI.

    Shuai Fan said:
    2. Can I understand that this device use the daisy chain method internal channel selection? 

    See section 8.5 Programming in the datasheet for how SPI is implemented. 

    SPI bus is used to set device configurations, operating parameters, and read out diagnostic information on the DRV89xx-Q1 device. The SPI operates in slave mode and connects to a master controller.

    Shuai Fan said:
    3. If I want to use daisy chain for multi DRV89XX control, can I understand below is a big daisy chain for external DRV89XX selection and each DRV89XX has its own small daisy chain structure?

    Multiple DRV89XX-Q1 devices can be connected to the master controller with and without the daisy chain

    See section 8.5.3 of the datasheet for details on how to configure accordingly.

    For more details on general implementation, see the following app note for more information on Daisy Chain Implementation for SPI.

    Best,

    David