Datasheet

PIC18CXX2
DS39026D-page 174  1999-2013 Microchip Technology Inc.
FIGURE 17-2: LOW VOLTAGE DETECT (LVD) BLOCK DIAGRAM
The LVD module has an additional feature that allows
the user to supply the trip voltage to the module from
an external source. This mode is enabled when bits
LVDL3:LVDL0 are set to 1111. In this state, the com-
parator input is multiplexed from the external input pin
LVDIN (Figure 17-3).
This gives flexibility, because it allows a user to config-
ure the Low Voltage Detect interrupt to occur at any
voltage in the valid operating range.
FIGURE 17-3: LOW VOLTAGE DETECT (LVD) WITH EXTERNAL INPUT BLOCK DIAGRAM
LVDIF
VDD
16 to 1 MUX
LVDEN
LVD Control
Register
Internally Generated
Nominal Reference Voltage
LVDIN
1.2V
LVD
EN
LVD Control
16 to 1 MUX
BGAP
BODEN
LVDEN
VxEN
LVDIN
Register
V
DD
VDD
Externally Generated
Trip Point