9.3 Low-Power Brown-out Reset (LPBOR)
The Low-Power Brown-out Reset (LPBOR) circuit provides alternative protection against Brown-out conditions. When VDD falls below the LPBOR threshold, the device is held in Reset. When this occurs, the BOR bit of the PCON0 register is cleared to indicate that a Brown-out Reset occurred. The BOR bit will be cleared when either the BOR or the LPBOR circuitry detects a BOR condition.
The LPBOR feature can be used with or without BOR enabled. When used while BOR is enabled,
the LPBOR can be used as a secondary protection circuit in case the BOR circuit fails to
detect the BOR condition. Additionally, when BOR is enabled except while in Sleep
(BOREN[1:0] = 10), the LPBOR circuit will hold the device in Reset while
VDD is lower than the LPBOR threshold, and will also re-arm the POR (see
Reset, WDT, Oscillator Start-up Timer,
Power-up Timer, Brown-out Reset and Low-Power Brown-out Reset Specifications for LPBOR Reset
voltage levels).
When used without BOR enabled, the LPBOR circuit provides a single Reset trip point with the benefit of reduced current consumption.
