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AN4286 Datasheet(PDF) 31 Page - STMicroelectronics

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

AN4286 Datasheet(HTML) 31 Page - STMicroelectronics

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Bootloader command set
AN4286
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DocID024458 Rev 2
Figure 23. Write Unprotect command: slave side
2.11
Readout Protect command
The Readout Protect command is used to enable the Flash memory read protection. When
the bootloader receives the Readout Protect command, it transmits the ACK byte to the
master. After transmission of the ACK byte, the bootloader enables the read protection for
the Flash memory.
At the end of the Readout Protect command, the bootloader transmits the ACK byte and
generates a system reset to take into account the new configuration of the option byte.



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