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IWRL6432: How to use SPI INT? Is it HOST_CLK_REQ?

Wesley He
Expert 6145 points
Part Number: IWRL6432
Other Parts Discussed in Thread: AWR2243,

Hi team,

In AWR2243, We have SPI_INT for slave to raise a request to let HOST read something from 2243. What's this PIN define in IWRL6432?  Is it HOST_CLK_REQ? Or WU_REQIN?

What's the different between these 2 pins.

Thanks,

Wesley

  • 0
    TI__Expert 4448 points

    Hi Wesley,

    I am unfamiliar with the AWR2243 as this is not a device that I work with, so I do not know about the specifics of the SPI_INT line. Based on my understanding, there is no exact equivalent for the 6432 device, neither of the HOST_CLK_REQ or WU_REQIN peripherals are used for this purpose. The WU_REQIN line is used as a GPIO trigger/wakeup source requesting the device to wake up from a Low Power Deep Sleep (LPDS) state. The HOST_CLK_REQ line is used in LVDS for raw data capture (though not utilized in SDK5.3) and otherwise could be used as a signal to request the host to provide a reference clock for synchronization purposes (also not utilized in SDK5.3).

    To achieve something like the SPI_INT line, I would just set up a generic GPIO interrupt trigger and use an ISR to handle the SPI write from the radar HOST to slave.

    Regards,
    Luke