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For chip authentication of ARIB STD T67 passes

M.H
Genius 5960 points
Other Parts Discussed in Thread: CC1175, CC1120, CC1200

Hi,

I think has been described through the authentication is for T67 ARIB STD the CC1120 / CC1200 / CC1175.

Can you tell us about the following points?

1. Do you have a Reference Design you Test the ARIB STD T67 in CC1120 / CC1200 / CC1175?

2. Do you have any Register settings you Test the ARIB STD T67 in CC1120 / CC1200 / CC1175? (Can also set value of SmartRF Studio)

3. In order to pass the ARIB STD T67, crystal oscillator of 32MHz accuracy of ± 4ppm is necessary? Do you have a model number to be recommended if necessary?

 

Best Regards,

hamada

  • 0
    TI__Mastermind 39860 points

    1) CC1120EM 420-470 MHz (http://www.ti.com/tool/cc1120em-420-470-rd), CC1200EM 420-470 MHz (http://www.ti.com/tool/CC120XEM-420-470-RD) and CC1125EM 420-470 MHz (http://www.ti.com/tool/cc1125em-420-470-rd) reference designs can be used

    2) Use SmartRF Studio to generate the register settings. Use one of the typical settings for narrowband operation as a starting point. Changing the modulation to 2-GFSK from 2-FSK will give better ACP and smaller 99% OBW at the cost of somewhat lower sensitivity.

    3) TCXO: 

    NDK: Type: NT2016SA. NDK spec. no END4774A, +/-0.5 ppm temperature error, +/- 1 ppm error due to aging (max per year)

    NDK: Type: NT2016SA. NDK spec. no TEE3017A, +/-2.5 ppm temperature error, +/- 1 ppm error due to aging (max per year)

    Epson model TG-5021CG-28N +/-2.0 ppm temperature error, +/- 1 ppm error due to aging (max firstyear)

  • 0 in reply to Sverre
    Genius 5960 points

    Hi, Sverre

    Thank you for replya.

    Please tell me additional.

    There are described in the following data sheet (SWRS112F) in paragraph 23 5.2 Frequency Synthesizer.

    ===============

    The oscillator generates the reference frequency for the synthesizer, as well as clocks for the analog-to-digital (ADC) and the digital part. To reduce system cost, CC1120 device has highaccuracy frequency estimation and compensation registers to measure and compensate for crystal inaccuracies.

    ===============

    "It is possible to suppress the cost since it is possible to compensate for the error of the external clock" I am considered to have meaning.

    Is it possible to reduce the unit cost of the external clock in this feature? If you can, do you make the settings in which register?

    Best Regards

    hamada

  • 0 in reply to M.H
    TI__Mastermind 39860 points

    The initial tolerance you can compensate for in production. Read the offset from the ideal value and write to register FREQOFF (page 67 in the CC112x User Guide).

    In the field you need to compensate for temperature drift ageing.

    If you know the crystal temperature coefficients you can make a SW TCXO CC112x has a temperature sensor you can use to measure the temperature. 

    In order to compensate for ageing you need to use a very accurate transmitter to compensate against. Read register FREQOFF_EST and write the offset back to register FREQOFF.

  • 0 in reply to Sverre
    Genius 5960 points

    Hi,Sverre

    Thank you for reply.

    Introduction of recommended clock and reference designs, thank you.

    By performing the design by using the reference design and the clock,

    Is it safe to expect to take a certification of ARIB STD T67?

    Best Regards,

    hamada

  • 0 in reply to M.H
    TI__Mastermind 39860 points

    Yes, CC1120/CC1200 are suited for systems targeting compliance with ARIB STD T67

  • 0 in reply to Sverre
    Genius 5960 points

    Hi, Sverre.

     

    Thank you for reply.

     

    Do you have a reference design of ARIB STD T67 for a CC1175?

     

    In some cases,

    Can you meet the ARIB STD T67 reference design of CC1175 and recommended clock?

     

    Best Regards,

    hamada

     

  • 0 in reply to M.H
    TI__Mastermind 39860 points

    Use the CC1125EM 420-470 MHz (http://www.ti.com/tool/cc1125em-420-470-rd) reference design as a starting point. Remove L191, C201, L201, C191; L192 and L193 from the design. Connect pins 19 and 20 to GND. Leave pin 18 (TRX) as not connect, and connect pad 1 of C181 to GND. 

    For ARIB STD T67 you need a very accurate clock reference; i.e. a TCXO. Crystal X1 can thus be removed. Connect XOSC_Q1 to GND. Leave XOSC_Q2 not connected.

    For operation above 70C use a TCXO with CMOS output and connect directly to pin 32 (EXT_XOSC). Do not use a series capacitor (C322) in this case.

    If the temperature range is not as high as 70C and above you can use a clipped sine with max 1.5Vpp swing. Use a 22 pF series capacitor in this case (C322)