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Infineon Microcontroller MB90F345CAPMC Flash Memory Firmware Dumping refers to reverse engineering MB90F345CAP microprocessor’s protective fuse bit and restoring heximal code from secured mcu mb90f345cap;

A sudden change in the supply voltage may cause the device to malfunction even within the specified VCC supply voltage operating range. Therefore, the VCC supply voltage should be stabilized. Stabilize the power supply voltage as follows as a standard level of stabilization.

VCC ripple variations (peak-to-peak value) at commercial frequencies (50 Hz/60 Hz) fall below 10% of the standard VCC supply voltage, The coefficient of fluctuation does not exceed 0.1 V/ms at instantaneous power switching. In the device, there are internal registers which are initialized only by a power-on reset. To initialize these registers, turn on the power again. As shown below, when the power is turned on in External-Bus mode, there is a possibility that output signal of Port 0 to Port 3 might be unstable irrespective of the reset input.

To use the CAN function, please set the DIRECT bit of the CAN Direct Mode Register (CDMR) to 1. If the DIRECT bit is set to ’0’ (initial value), wait states will be performed when accessing CAN registers after cloning MB90F342E secured microcontroller flash firmware. A security bit is located in the area of the flash memory. If protection code 01H is written in the security bit, the flash memory is in the protected state by security. Therefore please do not write 01H in this address if you do not use the security function. Refer to following table for the address of the security bit.