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CC1352P: Matter (Project CHIP) chip selection

Sean Scalf
Prodigy 20 points
Part Number: CC1352P
Other Parts Discussed in Thread: CC1352R,

Hello,

We are looking into using an SOC in the CC1352 line for dual band operation. The Sub-GHz will be used for our proprietary controls, but we are looking into offering several protocol options for the 2.4 GHz band. I noticed that only the datasheet for CC1352P7 lists Matter as an included protocol, but the Matter github lists CC1352R as a build option with limited capabilities. To run a full Thread device with BLE, will the extra flash for the CC1352P7 be required? If we are planning to add Matter as a protocol, will we need an external flash chip for performing OTA updates (either due to flash requirements or ability to update the additional ROM on the chip)?

Thanks

  • 0
    TI__Mastermind 31920 points

    Hi,

    Yes, to run Matter on a single device, the 704 KB variant is required (e.g. CC1352P7).
    This is by nature of the build size, to be elaborated next.

    Yes, an external flash would depend on flash capacity of the given device variant: the build size is on the order of 500-600 KB (see "Size comparison" of a recent PR: https://github.com/project-chip/connectedhomeip/pull/13512#issuecomment-1011478888).
    This may also impact the available flash for other code (such as your Sub-GHz proprietary controls).

    Note that for Matter, it uses two protocols for DMM -- Thread and BLE. DMM currently supports 2 protocols.
    I bring this up because you mentioned using Sub-GHz as well -- Matter + Sub-GHz protocol would be 3 protocols, which DMM does not currently support.
    Is this the use-case you were interested in?

    Thanks,
    Toby