AN3262 datasheet(21/27 Pages) STMICROELECTRONICS

部件名	AN3262

功能描述	Using the over-the-air bootloader with STM32W108 devices

PDF	27 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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21 / 27 page

AN3262

Bootloader command set

Doc ID 17845 Rev 2

21/27

Figure 23.

WRITE MEMORY command (device side)

WM = WRITE MEMORY command.

N+1 should always be a multiple of 4.

Ai14642d

ROP inactive?

Receive the start address (4 bytes) &

checksum

Flash memory

address?

Yes

Start WM(1)

Receive the number of bytes to be written

(1 byte), the data (N + 1 bytes)(2) and checksum

Checksum OK?

Yes

Received byte =

0x31+0xCE?

Send ACK byte

Write the received data to Flash

memory from the start address

Send

ACK

byte

End of WM(1)

Yes

Checksum OK?

Yes

RAM address?

Write the received data to RAM

from the start address

Yes

Option

byte address?

Write the received data to

Option byte area from start address

Yes

Write the Keys for Option byte

area access

Send

NACK

byte

Send ACK byte

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