SWRZ153 November   2023 CC1312PSIP

 

  1.   1
  2.   Abstract
  3. 1Advisories Matrix
  4. 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
  5. 3Advisories
    1.     Advisory Power_03
    2.     Advisory PKA_01
    3.     Advisory PKA_02
    4.     Advisory I2C_01
    5.     Advisory I2S_01
    6.     Advisory CPU_01
    7.     Advisory CPU_02
    8.     Advisory CPU_03
    9.     Advisory CPU_Sys_01
    10.     Advisory Sys_01
    11. 3.1 Sys_05
    12.     Advisory SYSCTRL_01
    13.     IOC_01
    14.     SRAM_01
    15.     GPTM_01
    16.     ADC_01
    17.     ADC_02
    18.     ADC_03
    19.     ADC_04
    20.     ADC_05
  6.   Trademarks
  7. 4Revision History

Advisory CPU_Sys_01

The SysTick Calibration Value (Register Field CPU_SCS.STCR.TENMS) Used to Set Up 10-ms Periodic Ticks is Incorrect When the System CPU is Running Off Divided Down 48-MHz Clock

Revisions Affected:

Revision F

Details:

When using the Arm® Cortex® SysTick timer, the TENMS register field (CPU_SCS.STCR.TENMS) will always shows the value corresponding to a 48-MHz CPU clock, regardless of the CPU division factor.

Workarounds:

One of the following two workarounds must be implemented:

Workaround 1: Do not use a divided down system CPU clock. In general, power savings are maximized by completing a task at full clock speed and then stopping the system CPU entirely after the task is complete.

 

Workaround 2: Read the system CPU division factor from the PRCM.CPUCLKDIV.RATIO register and compensate the TENMS field in software based on this value.

TI-provided drivers do not offer any functionality to divide the system CPU clock.