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Unlock Renesas Microprocessor R5F64114DFB
Unlock Renesas Microprocessor R5F64114DFB is a process to shut down the protective fuse bit through IC breaking technique, and then copy microcontroller embedded flash memory content out from original R5F64114DFB#U0, the process will normally take 3-4 working days;
The data being extracted out from Microcomputer R5F64114DFB#U0 flash memory need to understand to ensure it will be executed correctly:
The R5F64114DFB#U0 CPU can process 1-bit data, 4-bit (BCD) data, 8-bit (byte) data, and 16-bit (word) data.
Bit manipulation instructions operate on 1-bit data specified as bit n (n = 0, 1, 2, …, 7) in a byte operand.
All arithmetic and logic instructions except ADDS and SUBS can operate on byte data when Unlock Programmed PIC16C57C MCU.
The DAA and DAS instruction perform decimal arithmetic adjustments on byte data in packed BCD form. Each nibble of the byte is treated as a decimal digit.
The MOV.W, ADD.W, SUB.W, CMP.W, ADDS, SUBS, MULXU (8 bits ´ 8 bits), and DIVXU (16 bits ¸ 8 bits) instructions operate on word data.
below are the data format in the general register:
RnH: RnL:
Upper digit of general register Lower digit of general register
MSB: Most significant bit
LSB: Least significant bit
Word data stored in memory must always begin at an even address. In word access the least significant bit of the address is regarded as 0. If an odd address is specified, no address error occurs but the access is performed at the preceding even address in order to Motorola MC68HC908JK8 Embedded Flash Memory Restoration. This rule affects MOV.W instructions and branching instructions, and implies that only even addresses should be stored in the vector table.
below image shows the data format in R5F64114DFB#U0 memory:
When the stack is addressed by register R7, it must always be accessed a word at a time. When the CCR is pushed on the stack, two identical copies of the CCR are pushed to make a complete word. When they are restored, the lower byte is ignored.