10.2 Brown-out Reset (BOR)

The BOR circuit holds the device in Reset when V_DD reaches a selectable minimum level. Between the POR and BOR, complete voltage range coverage for execution protection can be implemented.

The Brown-out Reset module has four operating modes controlled by the BOREN bits. The four operating modes are:

• BOR is always on
• BOR is off when in Sleep
• BOR is controlled by software
• BOR is always off

Refer to Table 10-1 for more information.

The Brown-out Reset voltage level is selectable by configuring the BORV bits.

A V_DD noise rejection filter prevents the BOR from triggering on small events. If V_DD falls below V_BOR for a duration greater than parameter T_BORDC, the device will reset and the BOR bit will be cleared, indicating the Brown-out Reset condition occurred. See Figure 10-2.