We can carry out Microchip MCU PIC18F4320 Embedded Firmware Decryption, please view the Microchip MCU PIC18F4320 features for your reference:
When Brown-out Reset is enabled, the BOR bit always resets to ‘0’ on any Brown-out Reset or Power-on Reset event. This makes it difficult to determine if a Brown-out Reset event has occurred just by reading the state of BOR alone. A more reliable method is to simultaneously check the state of both POR and BOR when Microchip MCU PIC18F4320 Embedded Firmware Decryption.
This assumes that the POR bit is reset to ‘1’ in software immediately after any Power-on Reset event. If BOR is ‘0’ while POR is ‘1’, it can be reliably assumed that a Brown-out Reset event has occurred. When BOREN1:BOREN0 = 10, the BOR remains under hardware control and operates as previously described.
Whenever the device enters Sleep mode, however, the BOR is automatically disabled. When the device returns to any other operating mode, BOR is automatically re-enabled. This mode allows for applications to recover from brown-out situations, while actively executing code, when the device requires BOR protection the most. At the same time, it saves additional power in Sleep mode by eliminating the small incremental BOR current.
PIC18F4320 devices incorporate three separate on-chip timers that help regulate the Power-on Reset process. Their main function is to ensure that the device clock is stable before code is executed. These timers are:
Power-up Timer (PWRT) after Microchip MCU PIC18F4320 Embedded Firmware Decryption
Oscillator Start-up Timer (OST)
The Power-up Timer (PWRT) of PIC18F4320 devices is an 11-bit counter which uses the INTRC source as the clock input. This yields an approximate time interval of 2048 x 32 ìs = 65.6 ms. While the PWRT is counting, the device is held in Reset. The power-up time delay depends on the INTRC clock and will vary from chip to chip due to temperature and process variation. See DC parameter 33 for details. The PWRT is enabled by clearing the PWRTEN Configuration bit when EXTRACT IC.
