J-Link Str91X Commander (Command Line Tool) - Segger J-Link User Manual

4.2.2

J-Link STR91x Commander (Command line tool)

J-Link STR91x Commander (JLinkSTR91x.exe) is a tool that can be used to configure
STR91x cores. It permits some STR9 specific commands like:
• Set the configuration register to boot from bank 0 or 1
• Erase flash sectors
• Read and write the OTP sector of the flash
• Write-protect single flash sectors by setting the sector protection bits
• Prevent flash from communicate via JTAG by setting the security bit
All of the actions performed by the commands, excluding writing the OTP sector and
erasing the flash, can be undone. This tool can be used to erase the flash of the con-
troller even if a program is in flash which causes the ARM core to stall.
When starting the STR91x commander, a command sequence will be performed
which brings MCU into Turbo Mode.
"While enabling the Turbo Mode, a dedicated test mode signal is set and controls the
GPIOs in output. The IOs are maintained in this state until a next JTAG instruction is
send." (ST Microelectronics)
Enabling Turbo Mode is necessary to guarantee proper function of all commands in
the STR91x Commander.
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