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PM0073 Folha de dados(PDF) 14 Page - STMicroelectronics

Nome de Peças PM0073
Descrição Electrónicos  STM32Wxxx Flash memory microcontrollers
PDF  34 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PM0073 Folha de dados(HTML) 14 Page - STMicroelectronics

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Reading/programming the STM32Wxxx embedded Flash memory
PM0073
14/34
Doc ID 17766 Rev 5
2.2.3
Main Flash memory programming
The main Flash memory can be programmed 16 bits at a time. The program operation is
started when the CPU writes a half-word into a main Flash memory address with the PG bit
of the FLASH_CR register set. Any attempt to write data that is not half-word long will result
in a bus error response from the FPEC. If a read/write operation is initiated during
programming (BSY bit set), the CPU stalls until the ongoing main Flash memory
programming is over.
Figure 1.
Programming procedure
Read FLASH_CR_LOCK
FLASH_CR_LOCK
= 1
Yes
No
Yes
No
Perform unlock sequency
Write FLASH_CR_PG to 1
Perform half-word write at the
desired address
FLASH_SR_BSY
= 1
Check the programmed value
by reading the programmed
address
Enable FPEC clock
ai14307c



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