PIC18LF252-ISP Datasheet, PDF (192/332 Pages) Microchip Technology – High-Performance, Enhanced Flash Microcontrollers with 10-Bit A/D

PIC18FXX2
FIGURE 18-2:
LOW VOLTAGE DETECT (LVD) BLOCK DIAGRAM
VDD
LVDIN
LVD Control
Register
–
LVDIF
+
LVDEN
Internally Generated
Reference Voltage
1.2V Typical
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 18-3). 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 18-3:
LOW VOLTAGE DETECT (LVD) WITH EXTERNAL INPUT BLOCK DIAGRAM
VDD
VDD
LVD Control
Register
Externally Generated
Trip Point
LVDIN
LVDEN
–
LVD
+
VxEN
BODEN
EN
BGAP
DS39564C-page 190
© 2006 Microchip Technology Inc.