CHAPTER 19 FLASH MEMORY
User’s Manual U17446EJ3V1UD
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19.8.9 Examples of internal verify operation in self programming mode
Examples of internal verify 1 and 2 operations in self programming mode are explained below.
•
Internal verify 1
<1> Set 01H (internal verify 1) to the flash program command register (FLCMD).
<2> Set the block number for which internal verify is performed, to flash address pointer H (FLAPH).
<3> Set 00H to the flash address pointer L (FLAPL).
<4> Write the same value as that of FLAPH to the flash address pointer H compare register (FLAPHC).
<5> Set FFH to the flash address pointer L compare register (FLAPLC).
<6> Clear the flash status register (PFS).
<7> Write ACH to the watchdog timer enable register (WDTE) (clear and restart the watchdog timer counter)
Note
.
<8> Execute the HALT instruction then start self programming. (Execute an instruction immediately after the
HALT instruction if self programming has been executed.)
<9> Check if a self programming error has occurred using bit 1 (VCERR) and bit 2 (WEPRERR) of PFS.
Abnormal
→
<10>
Normal
→
<11>
<10> Internal verify processing is terminated abnormally.
<11> Internal verify processing is terminated normally.
•
Internal verify 2
<1> Set 02H (internal verify 2) to the flash program command register (FLCMD).
<2> Set the block number for which internal verify is performed, to flash address pointer H (FLAPH).
<3> Set the verify start address to the flash address pointer L (FLAPL).
<4> Write the same value as that of FLAPH to the flash address pointer H compare register (FLAPHC).
<5> Set the verify end address to the flash address pointer L compare register (FLAPLC).
<6> Clear the flash status register (PFS).
<7> Write ACH to the watchdog timer enable register (WDTE) (clear and restart the watchdog timer counter)
Note
.
<8> Execute the HALT instruction then start self programming. (Execute an instruction immediately after the
HALT instruction if self programming has been executed.)
<9> Check if a self programming error has occurred using bit 1 (VCERR) and bit 2 (WEPRERR) of PFS.
Abnormal
→
<10>
Normal
→
<11>
<10> Internal verify processing is terminated abnormally.
<11> Internal verify processing is terminated normally.
Note
This setting is not required when the watchdog timer is not used.
<R>
<R>