SWRZ111A November   2021  – January 2022 CC2652P7

 

  1.   Trademarks
  2. 1Advisories Matrix
  3. 2Nomenclature, Package Symbolization, and Revision Identification
    1. 2.1 Device and Development Support-Tool Nomenclature
    2. 2.2 Devices Supported
    3. 2.3 Package Symbolization and Revision Identification
  4. 3Advisories
    1.     Radio_01
    2.     Radio_02
    3.     Power_03
    4.     PKA_01
    5.     PKA_02
    6.     I2C_01
    7.     I2S_01
    8.     CPU_01
    9.     CPU_02
    10.     CPU_03
    11.     CPU_Sys_01
    12.     Sys_01
    13. 3.1 Sys_05
    14.     SYSCTRL_01
    15.     IOC_01
    16.     ADC_01
    17.     ADC_02
    18.     ADC_03
  5. 4Revision History

Radio_01

Proprietary radio modes: spurious emissions can affect regulatory compliance

Revisions Affected:

Revision B

Details:

When device internal load capacitors are used with the external 48-MHz crystal, energy couples from the crystal oscillator circuit to the RF output. This coupling causes spurious emissions at N × 48 MHz from carrier frequency. This includes, but is not limited to, the frequency bands supported by the device covered by the following regulations:

When using the +20-dBm RF power amplifier

  • FCC CFR47 Part 15 (US)
  • ETSI EN 300 328 (Europe)
  • ETSI EN 300 440 (Europe)

Workaround:

For compliance with affected standards, external load capacitors might be needed for the 48-MHz crystal to reduce spurious emissions. Internal capacitors (default 7-pF connected capacitance) must then be disconnected internally.

This workaround is implemented by defining the following symbols in the included customer configuration file (ccfg.c) available in the SimpleLink™ CC13xx and CC26xx Software Development Kit (SDK) examples:

#define SET_CCFG_MODE_CONF_XOSC_CAPARRAY_DELTA -128 
#define SET_CCFG_MODE_CONF_XOSC_CAP_MOD 0