Read MCU PIC16C57 Program is a process to extract embedded firmware out from Microcontroller flash and eeprom memory, start from decapsulate the silicon package and delayer the whole structure, recover MCU code can fulfill the task of IC cloning;

A fetch cycle begins with the program counter (PC) incrementing in Q1. In the execution cycle, the fetched instruction is latched into the Instruction Register (IR) in cycle Q1.

This instruction is then decoded and executed during the Q2, Q3, and Q4 cycles. Data memory is read during Q2 (operand read) and written during Q4 (destination write) if MCU protection can be removed and code will be extracted.

All instructions are single cycle, except for any program branches. These take two cycles since the fetch instruction is “flushed” from the pipeline while the new instruction is being fetched and then executed.

PIC16C57 memory is organized into program memory and data memory. For devices with more than 512 bytes of program memory, a paging scheme is used.

Program memory pages are accessed using one STATUS register bit. For the PIC16C57 with a data memory register file of more than 32 registers, a banking scheme is used when extract microcontroller at89s53 code.

Data memory banks are accessed using the File Select Register (FSR). The PIC16C57 devices have a 12-bit Program Counter (PC) capable of addressing a 2K x 12 program memory space.

Only the first 512 x 12 (0000h-01FFh) for the PIC16C57 and 1K x 12 (0000h-03FFh) for the PIC16C57 are physically implemented before extract mcu at89ls53 eeprom.

Refer to Figure 4-1. Accessing a location above these boundaries will cause a wrap around within the first 512 x 12 space (PIC16C57) or 1K x 12 space (PIC16C57).

The effective reset vector is at 000h, (see Figure 4-1). Location 01FFh (PIC16C57) or location 03FFh (PIC16C57) contains the internal clock oscillator calibration value. This value should never be overwritten.