SWRZ171 July   2025 CC2755R10

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Advisories Matrix
  5. 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
  6. 3Advisories
    1. 3.1  ADC_08
    2. 3.2  ADC_09
    3. 3.3  BATMON_01
    4. 3.4  BATMON_02
    5. 3.5  SYS_204
    6. 3.6  SYS_206
    7. 3.7  SYS_207
    8. 3.8  APU_201
    9. 3.9  UDMA_01
    10. 3.10 RADIO_05

3.7 SYS_207

Standby entry may not be gated if the FLTSETTLED bit is read too soon.

Revisions Affected

F

Description

Standby entry may not be gated if attempted before the LFINC filter settles and is read too soon. This issue is not seen when using LFXT.

Workaround

To workaround this, when using LFOSC:

1. Clear both the interrupts.

2. Check for CKMD.RIS.HFXTGOOD.

3. Check for CKMD.RIS.LFTICK.

4. Check for FLTSETTLED.

Standby entry should be triggered only when the LFINC filter has settled, which can be confirmed by reading the memory masked register (MMR) CKMD.LFCLKSTAT.FLTSETTLED bit.

Alternatively, LFXT can be used, and this can be avoided. This workaround is incorporated into the SimpleLink™ Low Power F3 software development kit (SDK) version 9.11 and newer.