SLAZ112I October   2012  – May 2021 MSP430AFE251

 

  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.      PW24
    3. 5.3 Memory-Mapped Hardware Revision (TLV Structure)
  6. 6Advisory Descriptions
    1. 6.1  BCL12
    2. 6.2  CPU4
    3. 6.3  EEM20
    4. 6.4  FLASH24
    5. 6.5  FLASH27
    6. 6.6  FLASH36
    7. 6.7  TA12
    8. 6.8  TA16
    9. 6.9  TA18
    10. 6.10 TA21
    11. 6.11 TAB22
    12. 6.12 US15
  7. 7Revision History

6.5 FLASH27

FLASH Module

Category

Functional

Function

EEI feature can disrupt segment erase

Description

When a flash segment erase operation is active with EEI feature selected (EEI=1 in FLCTL1) and GIE=0, the following can occur:

An interrupt event causes the flash erase to be stopped, and the flash controller expects an RETI to resume the erase. Because GIE=0, interrupts are not serviced and RETI will never happen.

Workaround

1) Do not set bit EEI=1 when GIE = 0.
or,
2) Force an RETI instruction during the erase operation during the check for BUSY=1 (FCLTL3).

Sample code:

        MOV R5, 0(R5) ; Dummy write, erase segment
LOOP: BIT #BUSY, &FCTL3 ; test busy bit
       JMP SUB_RETI ; Force RETI instruction
        JNZ LOOP ; loop while BUSY=1

SUB_RETI: PUSH SR
          RETI