PIC18F258 MICROCHIP [Microchip Technology], PIC18F258 Datasheet - Page 258

• Manufacturer Part Number: PIC18F258
• Description: High Performance, 28/40-Pin Enhanced FLASH Microcontrollers with CAN
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18FXX8
FIGURE 23-2:
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 to one input of the comparator (Figure 23-3).
FIGURE 23-3:
DS41159B-page 256
Externally Generated
Trip Point
LVDEN
LOW VOLTAGE DETECT (LVD) BLOCK DIAGRAM
LOW VOLTAGE DETECT (LVD) WITH EXTERNAL INPUT BLOCK DIAGRAM
V
DD
LVDIN
V
DD
LVDIN
Internally Generated
Reference Voltage
EN
Preliminary
V
DD
LVD3:LVD0
The other input is connected to the internally gener-
ated
Section 27.2). This gives users flexibility, because it
allows them to configure the Low Voltage Detect inter-
rupt to occur at any voltage in the valid operating
range.
LVD3:LVD0
voltage
VxEN
BODEN
LVDCON
Register
reference
BGAP
LVDCON
Register
LVDIF
2002 Microchip Technology Inc.
(parameter
LVDEN
LVD
D423
in