ST STM32F105 series

AN2662 USART bootloader
Doc ID 14156 Rev 1 31/83
Figure 16. Erase Memory command: device side
1. ER = Erase Memory.
The host sends the bytes to the STM32F105xx and STM32F107xx as follows:
Byte 1: 0x43
Byte 2: 0xBC
Wait for ACK
Byte 3: 0xFF or number of pages to be erased (0 ≤ N ≤ maximum number of pages)
Byte 0x00 or (N + 1 bytes (page numbers) and then the checksum for byte 3 and
the following bytes)
ROP active
Receive the number of pages
to be erased (1 byte)
No
Ye s
ai14642b
Start ER
(1)
No
Received bytes =
0x43+0xBC?
Send ACK byte
Receive the page codes
Checksum
OK?
Send NACK byte
End of ER
(1)
No
Ye s
No
Ye s
0xFF received?
Receive the checksum
Erase the corresponding pages
Send ACK byte
Ye s
No
Ye s
Start Global Erase
(Mass Erase)