BSL Features of MSP430 MCU-EEWORLD

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The significance of BSL:

1. Without the need for an emulator or programmer, memory modification (which can be applied to parameter modification) and program download can be realized. It can accelerate mass production after the program is mature. It is convenient to modify program parameters on the board.

2. After the JATG fuse is blown, the only way to access the memory.

The MSP430 boot loader (BSL) allows users to access the CPU memory, including Flash and Ram, through a standard RS-232 serial port. This feature provides a convenient way to maintain embedded applications.

In order to make the MSP430 microcontroller enter the BSL, a specific timing is required on a specific pin. After receiving this specific timing, the CPU program pointer (PC) points to the address 0C00H in the memory, which is a 1K ROM area (0C00H-1000H) where the BSL is located.

The operations on the CPU through BSL include: read memory area, write memory area, flash erase, flash segment erase. Except flash segment erase, other functions need to verify the password first. The password is the 32-byte content stored in the address 0FFE0H~0FFFFH segment.

Keywords：MSP430 Reference address：BSL Features of MSP430 MCU

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