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Original question:

CCS/CC1310: CC1310 synchronization word problem

CCS/CC1310: CC1310 smartRF set up

Wenting Wu
Intellectual 2335 points
Part Number: CC1310

Tool/software: Code Composer Studio

Hello TER,

As talking through Email, do you mind helping to provide a 470Kbps standard set-up?

  • 0
    TI__Guru**** 317180 points

    They should get very close to optimal settings if they start from the 500 kbps settings and change the datarate to 470 kbps.

    Frequency band: The settings for frequency band is independent of the datarate, they can compare the 50 kbps setting for 868 MHz and 433 MHz to find the delta needed for the 400 MHz band. 

  • 0 in reply to TER
    TI__Intellectual 2335 points

    Hello TER,

    Thanks for your information. The customer has adjustment the data rate from 680Kbps to 470Kbps. While the customer worries about meeting the same issue during mass production as the customer met for 680Kps. So the customer want to compare a standard one with setup done by themselves. 

    Best regards,

    wenting 

  • 0 in reply to Wenting Wu
    TI__Guru**** 317180 points

    Going from 500 kbps to 470 kbps should cause less issues than the transition up to 680 kbps. I will look at it this week hopefully to see if I can provide settings. 

  • 0 in reply to TER
    TI__Intellectual 2335 points

    Thanks for your supporting TER!

  • 0 in reply to Wenting Wu
    TI__Guru**** 317180 points

    I reread the mail chain. To be sure that I provide relevant settings, which frequency do they want to use 470 kbps on? (several frequency bands where mentioned, not sure exactly which one that is the relevant one)

  • 0 in reply to TER
    TI__Intellectual 2335 points

    Hello TER,

    The bandwidth is still 720MHz to 800MHz (the same as 680Kpbs case you involved in).

    In order to response to recent band (720MHz-800MHz) taken up by 5G immediately, the customer took passive measurements to low data-rate from origin 680Kbps  to 470Kbps firstly. 

    The good solution for the customer is to alter to another bands which we've talked in Email.

    Best regards,

    wenting 

  • 0 in reply to Wenting Wu
    TI__Guru**** 317180 points

    For 783 MHz you can use the following settings:

    // GFSK, 4 byte sync, 470kbps, DIV6, 783 MHz
    TC703 modulation.modType 1
    TC703 modulation.deviation 660
    TC703 symbolRate.preScale 8
    TC703 symbolRate.rateWord 164277
    TC703 rxBw 44
    TC703 preamConf.nPreamBytes 4
    TC703 preamConf.preamMode 0
    TC703 formatConf.nSwBits 32
    TC703 formatConf.bMsbFirst 1
    TC703 loDivider 6
    TC703 frequency 783
    TC703 centerFreq 783
    TC703 fractFreq 0
    TC703 intFreq 0x8000
    TC703 syncWord 0x930B51DE

    Use the same overides as for 500 kbps (868 MHz) from Studio.

    Change

        // Synth: Set divider bias to disabled (specific for loDivider=5)

    (uint32_t)0x18000200,

    to 

    (uint32_t)0x18000100,

    I set the RX BW to about 700 kHz to allow for some xtal tolerance