SWRZ134F April   2023  – September 2025 CC2340R5

PRODUCTION DATA  

  1.   1
  2.   Abstract
  3. 1Advisories Matrix
  4. 2Nomenclature, Package Symbolization, and Revision Identification
    1. 2.1 Device Nomenclature
    2. 2.2 Devices Supported
    3. 2.3 Package Symbolization and Revision Identification
  5. 3Advisories
    1. 3.1 SPI_04
    2. 3.2 ADC_08
    3. 3.3 ADC_09
    4. 3.4 BATMON_01
    5. 3.5 CLK_01
    6. 3.6 CKM_01
    7. 3.7 I2C_01
    8. 3.8 GPIO_01
    9. 3.9 PMU_01
  6. 4Trademarks
  7. 5Revision History

3.6 CKM_01

Tracking loop issues during standby-wake

Revisions Affected

See Table 1-1

Details

In a few corner cases, the HFOSC tracking loop stops working out of standby, with TRACKREFLOSS getting set, indicating that the selected reference clock of the tracking loop is lost.

Workaround

The standby entry sequence includes disabling software override and clearing CKM LDO control bits. These writes have to be sequenced such that the software override is cleared first, and then the LDOCTL bits are all set to zero.

If these settings occur in parallel, the tracking loop is seen to get stuck in a few cases.

The workaround has been implemented within the power drivers and is a part of the 9.10 SDK release.