SLAZ552W September   2014  – May 2021 MSP430FR4131

 

  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.      DGG48
      2.      DGG56
      3.      PM64
    3. 5.3 Memory-Mapped Hardware Revision (TLV Structure)
  6. 6Advisory Descriptions
    1. 6.1  ADC39
    2. 6.2  ADC50
    3. 6.3  ADC63
    4. 6.4  CPU21
    5. 6.5  CPU22
    6. 6.6  CPU40
    7. 6.7  CPU46
    8. 6.8  CS11
    9. 6.9  CS13
    10. 6.10 EEM23
    11. 6.11 EEM28
    12. 6.12 EEM30
    13. 6.13 GC1
    14. 6.14 GC4
    15. 6.15 GC5
    16. 6.16 PMM32
    17. 6.17 PORT28
    18. 6.18 RTC15
    19. 6.19 SYS23
    20. 6.20 USCI41
    21. 6.21 USCI42
    22. 6.22 USCI45
    23. 6.23 USCI47
    24. 6.24 USCI50
  7. 7Revision History

6.8 CS11

CS Module

Category

Functional

Function

FLL cannot lock at low or high temperature

Description

The FLL may fail to lock under the following conditions:

(1) at low temperature -40C if DCOTAP (CSCTL0.DCO) value is too close to 0x1FF when FLL is locked at room temperature.

OR

(2) The FLL may fail to lock at high temperature 85C if DCOTAP (CSCTL0.DCO) value is too close to 0x0 when FLL is locked at room temperature.

Workaround

1. Calibration once at room temperature

(a) Check the DCOTAP value when FLL is locked at room temperature 22C-28C.

(b) If DCOTAP is between 0x190 and 0x70, go to step (d).  

(c) If DCOTAP is greater than 0x190, set register DCOFTRIMEN=1 and increase register DCOFTRIM by 1; If DCOTAP is less than 0x70, set register DCOFTRIMEN=1 and decrease register DCOFTRIM by 1. Then repeat from step (a).

(d) Save calibrated DCOFTRIM value into FRAM.

(e) Set calibration flag and save it into FRAM.

AND

2. When user code boot up again, and if the calibration flag in FRAM is set, configure register DCOFTRIMEN=1 and load calibrated DCOFTRIM value from FRAM into register DCOFTRIM before enabling FLL to lock.