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Unlock Microcontroller AT87LV51 Software will be possible after use focus ion beam technology to remove the security fuse bit, by breaking IC tamper resistance system, the content from flash memory can be dump directly;

Unlock Microcontroller AT87LV51 Software will be possible after use focus ion beam technology to remove the security fuse bit, by breaking IC tamper resistance system

The AT87LV51 devices have a 2-deep, 8-bit wide hardware PUSH/POP stack. The AT87LV51 devices have a 2-deep, 9-bit wide hardware PUSH/POP stack. ACALL instruction will PUSH the current value of Stack 1 into Stack 2 and then PUSH the current PC value, incremented by one, into Stack Level 1. If more than two sequentialCALLs are executed, only the most recent two return addresses are stored if extract infineon ic saf-c164ci-8em Microcontroller.

A RETLW instruction will POP the contents of Stack Level 1 into the PC and then copy Stack Level 2 contents into level 1. If more than two sequential RETLWs are executed, the stack will be filled with the address previously stored in Stack Level 2.

The INDF register is not a physical register. Addressing INDF actually addresses the register whose address is contained in the FSR register (FSR is a pointer). This is indirect addressing after read pic mcu pic16f887 Microcontroller.

Register file 09 contains the value 10h

Register file 0A contains the value 0Ah

Load the value 09 into the FSR register

· Increment the value of the FSR register by one (FSR = 0A)

· A read of the INDR register now will return the value of 0Ah.

Reading INDF itself indirectly (FSR = 0) will produce 00h. Writing to the INDF register indirectly results in a no operation (although Status bits may be affected) when read cpld ic xc2c128 jed file.

A simple program to clear RAM locations 10h-1Fh using indirect addressing is shown in Example 4-1. The FSR is a 5-bit wide register. It is used in conjunction with the INDF register to indirectly address the data memory area. The FSR<4:0> bits are used to select data memory addresses 00h to 1Fh.