The PIC12LC671 differentiates between various kinds of Reset which will greatly affect the result of MCU PIC12LC671 Code Extraction:

Power-on Reset (POR)

WDT Reset during normal operation

WDT Reset during Sleep

MCLR Reset during normal operation

MCLR Reset during Sleep

Brown-out Reset (BOR)

Some registers are not affected in any Reset condition; their status is unknown on POR and unchanged in any other Reset. Most other registers are reset to a “Reset state” on:

Power-on Reset

MCLR Reset

MCLR Reset during Sleep

WDT Reset

Brown-out Reset (BOR)

They are not affected by a WDT wake-up since this is viewed as the resumption of normal operation by Extract Code Of DsPIC30F2023 Microchip Microprocessor. TO and PD bits are set or cleared differently in different Reset situations, as indicated in Table 16-2. These bits are used in software to determine the nature of the Reset.

See Table 16-5 for a full description of Reset states of all registers. A simplified block diagram of the On-Chip Reset Circuit can be applied for MCU cracking. The MCLR Reset path has a noise filter to detect and ignore small pulses.

The on-chip POR circuit holds the chip in Reset until VDD has reached a high enough level for proper operation. To take advantage of the POR, simply connect the MCLR pin through a resistor to VDD to ease the difficulty of Copy Software From Secured Microprocessor DsPIC30F2020. This will eliminate external RC components usually needed to create Power-on Reset.

A maximum rise time for VDD is required. If the BOR is enabled, the maximum rise time specification does not apply. The BOR circuitry will keep the device in Reset until VDD reaches VBOR.