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Secured Microcontroller MSP430G2131 Flash Memory Firmware Cloning needs to attack msp430g2131 locked fuse bit by focus ion beam and then readout embedded firmware from new MCU;

The MSP430 microcontrollers have one active mode and five software-selectable low-power modes of operation. An interrupt event can wake up the device from any of the five low-power modes, service the request and crack encrypted msp430g2121 flash memory, and restore back to the low-power mode on return from the interrupt program.

The following six operating modes can be configured by software:

• Active mode (AM)
  • All clocks are active.
  • Low-power mode 0 (LPM0)
    • CPU is disabled.
    • ACLK and SMCLK remain active.
    • MCLK is disabled.
  • Low-power mode 1 (LPM1)
    • CPU is disabled.
    • ACLK and SMCLK remain active.
    • MCLK is disabled.
    • DCO dc-generator is disabled if DCO not used in active mode.
  • Low-power mode 2 (LPM2)
    • CPU is disabled.
    • ACLK remains active.
    • MCLK and SMCLK are disabled.
    • DCO dc-generator remains enabled.
  • Low-power mode 3 (LPM3)
    • CPU is disabled.
    • ACLK remains active.
    • MCLK and SMCLK are disabled.
    • DCO dc-generator is disabled.
  • Low-power mode 4 (LPM4)
    • CPU is disabled.
    • ACLK, MCLK, and SMCLK are disabled.
    • DCO dc-generator is disabled.
    • Crystal oscillator is stopped.

The interrupt vectors and  the  power-up  starting  address  are  located  in  the  address  range  of  0FFFFh to 0FFC0h. The vector contains the 16-bit address of the appropriate interrupt handler instruction sequence. If the reset vector (located at address 0FFFEh) contains 0FFFFh for attacking ti msp430g2352 flash memory (for example, if flash is not  programmed), the CPU goes into LPM4 immediately after power up.