The BOREN0 and BOREN1 bits in the Configuration Word register selects one of four BOR modes in the process of Read Heximal of MCU PIC16F628. Two modes have been added to allow software or hardware control of the BOR enable. When BOREN<1:0> = 01, the SBOREN bit (PCON<4>) enables/disables the BOR allowing it to be controlled in software.

By selecting BOREN<1:0>, the BOR is automatically disabled in Sleep to conserve power and enabled on wake-up. In this mode, the SBOREN bit is disabled. See Register 16-1 for the configuration word definition. If VDD falls below VBOR for greater than parameter (TBOR) (see Section 19.0 “Electrical Specifications”), the Brown-out situation will reset the device in order to Crack MCU.

This will occur regardless of VDD slew rate. A Reset is not insured to occur if VDD falls below VBOR for less than parameter (TBOR). On any Reset (Power-on, Brown-out Reset, Watchdog Timer, etc.), the chip will remain in Reset until VDD rises above VBOR. The Power-up Timer will now be invoked, if enabled and will keep the chip in Reset an additional 64 ms.

If VDD drops below VBOR while the Power-up Timer is running, the chip will go back into a Brown-out Reset and the Power-up Timer will be re-initialized when executing Microcontroller PIC18F8680 Program Copying. Once VDD rises above VBOR, the Power-up Timer will execute a 64 ms Reset.

The PIC16F628 stores the BOR calibration values in fuses located in the Calibration Word (2008h). The Calibration Word is not erased when using the specified bulk erase sequence in the “PIC16F628 Memory Programming Specification” (DS41244) and thus, does not require reprogramming from Read Heximal of MCU PIC16F628.

Address 2008h is beyond the user program memory space. It belongs to the special configuration memory space (2000h-3FFFh), which can be accessed only during programming. See “PIC16F628 Memory Programming Specification” (DS41244) for more information.

On power-up, the time-out sequence is as follows: first, PWRT time-out is invoked after POR has expired, then OST is activated after the PWRT time-out has expired. The total time-out will vary based on oscillator configuration and PWRTE bit status.

For example, in EC mode with PWRTE bit erased (PWRT disabled), there will be no time-out at all. The device can execute code from the INTOSC while OST is active to facilitate the process of Read Protected MCU PIC18F8622 Heximal, by enabling Two-Speed Start-up or Fail-Safe Monitor (see Section 4.6.2 “Two-Speed Start-up Sequence” and Section 4.7 “Fail-Safe Clock Monitor”).