Extract Microprocessor PIC16C58B Data from eeprom after unlock microcontroller PIC16C58B secured memory, and copy program pic16c58b into new MCU;

PIC16C58B devices have a 12-bit wide L.I.F.O. hardware push/pop stack. A CALL instruction will push the current value of stack 1 into stack 2 and then push the current data counter value, incremented by one, into stack level 1.

If more than two sequential CALL’s are executed, only the most recent two return addresses are stored. ARETLW instruction will pop the contents of stack level 1 into the data counter and then extract stack level 2 contents into level 1.

If more than two sequential RETLW’s are executed, the stack will be filled with the address previously stored in level 2. Note that the W register will be loaded with the literal value specified in the instruction.

This is particularly useful for the implementation of data look-up tables within the data memory. Upon any reset, the contents of the stack remain unchanged, however the data counter (PCL) will also be reset to 0 after copy Microprocessor PIC16F74 code.

The INDF register is not a physical register. Addressing INDF actually addresses the register As with any other register, the I/O register can be written and read under data control.

However, read instructions (e.g., MOVF GPIO,W) always read the I/O pins independent of the pin’s input/output modes. On RESET, all I/O ports are defined as input (inputs are at hi-impedance) since the I/O control registers are all set.

See Section 7.0 for SCL and SDA description for PIC16C58B. GPIO is an 8-bit I/O register. Only the low order 6 bits are used (GP5:GP0). Bits 7 and 6 are unimplemented and read as ‘0’s before break IC PIC16F914 heximal.

Please note that GP3 is an input only pin. The configuration word can set several I/O’s to alternate functions. When acting as alternate functions the pins will read as ‘0’ during port read.

Pins GP0, GP1, and GP3 can be configured with weak pull-ups and also with wake-up on change. The wake-up on change and weak pull-up functions are not pin selectable. If pin 4 is configured as MCLR, weak pull-up is always on and wake-up on change for this pin is not enabled.

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