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Unlock Microcontroller ATMEGA164PA secured protection and disable the security fuse bit, decapsulate the silicon package and recover MCU Eeprom data and flash program out from its memory.

Unlock Microcontroller ATMEGA164PA secured protection and disable the security fuse bit, decapsulate the silicon package and recover MCU Eeprom data and flash program out from its memory

Note that the XMEM interface is asynchronous and that the waveforms in the following figures are related to the internal system clock.

The skew between the internal and external clock (XTAL1) is not guarantied (varies between devices temperature, and supply voltage). Consequently, the XMEM interface is not suited for synchronous operation if crack microcontroller pic18f4515 code.

Writing SRE to one enables the External Memory Interface.The pin functions AD7:0, A15:8, ALE, WR, and RD are activated as the alternate pin functions. The SRE bit overrides any pin direction settings in the respective data direction registers.

Writing SRE to zero, disables the External Memory Interface and the normal pin and data direction settings are used. It is possible to configure different wait-states for different External Memory addresses after extract ic pic18f2423 code.

The external memory address space can be divided in two sectors that have separate wait-state bits. The SRL2, SRL1, and SRL0 bits select the split of the sectors, see Table 4 and Figure 14. By default, the SRL2, SRL1, and SRL0 bits are set to zero and the entire external memory address space is treated as one sector.

When the entire SRAM address space is configured as one sector, the wait-states are configured by the SRW11 and SRW10 bits. The SRW11 and SRW10 bits control the number of wait-states for the upper sector of the external memory address space.

The SRW01 and SRW00 bits control the number of wait-states for the lower sector of the external memory address space, Writing XMBK to one enables the bus keeper on the AD7:0 lines before extract chip pic18f4523 program.

When the bus keeper is enabled, AD7:0 will keep the last driven value on the lines even if the XMEM interface has tri-stated the lines. Writing XMBK to zero disables the bus keeper. XMBK is not qualified with SRE, so even if the XMEM interface is disabled, the bus keepers are still activated as long as XMBK is one.