Datasheet

 2003-2013 Microchip Technology Inc. DS30498D-page 175
PIC16F7X7
FIGURE 15-4: LOW-VOLTAGE DETECT (LVD) BLOCK DIAGRAM
The LVD module has an additional feature that allows
the user to supply the sense voltage to the module
from an external source. This mode is enabled when
bits LVDL3:LVDL0 are set to ‘1111’. In this state, the
comparator input is multiplexed from the external input
pin, LVDIN (Figure 15-5). This gives users flexibility
because it allows them to configure the Low-Voltage
Detect interrupt to occur at any voltage in the valid
operating range.
FIGURE 15-5: LOW-VOLTAGE DETECT (LVD) WITH EXTERNAL INPUT BLOCK DIAGRAM
LVDIF
VDD
16-to-1 MUX
LVDEN
LVD Control
Register
Internally Generated
Reference Voltage
LVDIN
1.2V
LVD
EN
LVD Control
16-to-1 MUX
BGAP
BODEN
LVDEN
LVDEN
LVDIN
Register
VDD
VDD
Externally Generated
Trip Point