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PM0073 bảng dữ liệu(PDF) 17 Page - STMicroelectronics

tên linh kiện PM0073
Giải thích chi tiết về linh kiện  STM32Wxxx Flash memory microcontrollers
PDF  34 Pages
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PM0073 bảng dữ liệu(HTML) 17 Page - STMicroelectronics

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PM0073
Reading/programming the STM32Wxxx embedded Flash memory
Doc ID 17766 Rev 5
17/34
Mass Erase
The Mass Erase command can be used to completely erase the user pages of the Flash
memory. The information block is unaffected by this procedure. The following sequence is
recommended:
1.
Enable the FPEC clock.
2.
Check that no Flash memory operation is ongoing by checking the BSY bit in the
FLASH_SR register.
3.
Set the MER bit in the FLASH_CR register.
4.
Set the STRT bit in the FLASH_CR register.
5.
Wait for the BSY bit to be reset.
6.
Read all the pages and verify.
Figure 3.
Flash memory Mass Erase procedure
Read FLASH_CR_LOCK
FLASH_CR_LOCK
= 1
Yes
No
Yes
No
Perform unlock sequency
Write into FLASH_CR_MER
to 1
Write FLASH_CR_STRT to 1
FLASH_SR_BSY
= 1
Check the erase operation by
reading all the addresses in
the user memory
Enable FPEC clock
ai14306c



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