ST STM32F105 series Application Note

USART bootloader AN2662
28/83 Doc ID 14156 Rev 1
Figure 14. Write Memory command: device side
1. WM = Write Memory.
ROP inactive?
Receive the start address (4 bytes) &
checksum
Flash memory
address?
No
Ye s
ai14642b
Start WM
(1)
Receive the number of bytes to be written
(1 byte), the data (N + 1 bytes) & the checksum
Checksum OK?
No
Ye s
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
Ye s
No
Ye s
Checksum OK?
No
Ye s
RAM address?
Write the received data to RAM
from the start address
Ye s
Ye s
Option
byte address?
& address =
0x1FFF F800?
Write the received data to
Option byte area from start address
Ye s
Ye s
Write the Keys for Option byte
area access
Generate system reset
Send
NACK
byte
Send ACK byte

ST STM32F105 series Specifications

General

Brand	ST
Model	STM32F105 series
Category	Microcontrollers
Language	English