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AN3262 Fiches technique(PDF) 21 Page - STMicroelectronics

No de pièce AN3262
Description  Using the over-the-air bootloader with STM32W108 devices
PDF  27 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3262 Fiches technique(HTML) 21 Page - STMicroelectronics

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AN3262
Bootloader command set
Doc ID 17845 Rev 2
21/27
Figure 23.
WRITE MEMORY command (device side)
1.
WM = WRITE MEMORY command.
2.
N+1 should always be a multiple of 4.
Ai14642d
ROP inactive?
Receive the start address (4 bytes) &
checksum
Flash memory
address?
No
Yes
Start WM(1)
Receive the number of bytes to be written
(1 byte), the data (N + 1 bytes)(2) and checksum
Checksum OK?
No
Yes
Received byte =
0x31+0xCE?
Send ACK byte
Send ACK byte
Write the received data to Flash
memory from the start address
Send
ACK
byte
End of WM(1)
No
Yes
No
Yes
Checksum OK?
No
Yes
RAM address?
Write the received data to RAM
from the start address
Yes
Yes
Option
byte address?
Write the received data to
Option byte area from start address
Yes
Yes
Write the Keys for Option byte
area access
Send
NACK
byte
Send ACK byte



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