SLAZ441K March   2013  – May 2021 MSP430G2955

 

  1. 1Functional Advisories
  2. 2Preprogrammed Software Advisories
  3. 3Debug Only Advisories
  4. 4Fixed by Compiler Advisories
  5. 5Nomenclature, Package Symbolization, and Revision Identification
    1. 5.1 Device Nomenclature
    2. 5.2 Package Markings
      1.      DA38
      2.      RHA40
    3. 5.3 Memory-Mapped Hardware Revision (TLV Structure)
  6. 6Advisory Descriptions
    1. 6.1  BCL12
    2. 6.2  CPU4
    3. 6.3  SYS15
    4. 6.4  TA12
    5. 6.5  TA16
    6. 6.6  TA21
    7. 6.7  TAB22
    8. 6.8  TAB26
    9. 6.9  TAB26
    10. 6.10 TB2
    11. 6.11 TB16
    12. 6.12 TB24
    13. 6.13 USCI20
    14. 6.14 USCI22
    15. 6.15 USCI23
    16. 6.16 USCI24
    17. 6.17 USCI25
    18. 6.18 USCI26
    19. 6.19 USCI29
    20. 6.20 USCI30
    21. 6.21 USCI34
    22. 6.22 USCI35
    23. 6.23 USCI40
    24. 6.24 XOSC5
  7. 7Revision History

6.4 TA12

TA Module

Category

Functional

Function

Interrupt is lost (slow ACLK)

Description

Timer_A counter is running with slow clock (external TACLK or ACLK)compared to MCLK. The compare mode is selected for the capture/compare channel and the CCRx register is incremented by one with the occurring compare interrupt (if TAR = CCRx). Due to the fast MCLK the CCRx register increment (CCRx = CCRx+1) happens before the Timer_A counter has incremented again. Therefore the next compare interrupt should happen at once with the next Timer_A counter increment (if TAR = CCRx + 1). This interrupt gets lost.

Workaround

Switch capture/compare mode to capture mode before the CCRx register increment. Switch back to compare mode afterwards.