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AN4286 Datasheet(PDF) 2 Page - STMicroelectronics

Part # AN4286
Description  SPI protocol used in the STM32 bootloader
Download  38 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4286 Datasheet(HTML) 2 Page - STMicroelectronics

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Contents
AN4286
2/38
DocID024458 Rev 2
Contents
1
SPI Bootloader code sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2
Bootloader command set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1
Safety of communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2
Get command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3
Get Version command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.4
Get ID command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.5
Read Memory command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.6
Go command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.7
Write Memory command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.8
Erase Memory command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.9
Write Protect command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2.10
Write Unprotect command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
2.11
Readout Protect command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
2.12
Readout Unprotect command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3
Evolution of the bootloader protocol versions . . . . . . . . . . . . . . . . . . 36
4
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37


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