SLAZ155I October   2012  – May 2021 MSP430F2012

 

  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.      PW14
      2.      N14
      3.      RSA16
    3. 5.3 Memory-Mapped Hardware Revision (TLV Structure)
  6. 6Advisory Descriptions
    1. 6.1  BCL9
    2. 6.2  BCL10
    3. 6.3  BCL11
    4. 6.4  BCL12
    5. 6.5  BCL13
    6. 6.6  BCL14
    7. 6.7  CPU4
    8. 6.8  EEM20
    9. 6.9  FLASH16
    10. 6.10 FLASH22
    11. 6.11 PORT10
    12. 6.12 SBW1
    13. 6.13 SYS15
    14. 6.14 TA12
    15. 6.15 TA16
    16. 6.16 TA21
    17. 6.17 TAB22
    18. 6.18 USI4
    19. 6.19 USI5
    20. 6.20 XOSC5
    21. 6.21 XOSC8
  7. 7Revision History

6.14 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.