PIC18C242 MICROCHIP [Microchip Technology], PIC18C242 Datasheet - Page 177

• Manufacturer Part Number: PIC18C242
• Description: High-Performance Microcontrollers with 10-Bit A/D
• Manufacturer: MICROCHIP [Microchip Technology]

17.1
The Low Voltage Detect Control register controls the
operation of the Low Voltage Detect circuitry.
Register 17-1: LVDCON Register
bit 7:6
bit 5
bit 4
bit 3:0
7/99 Microchip Technology Inc.
Control Register
bit 7
Unimplemented: Read as ’0’
IRVST: Internal Reference Voltage Stable Flag bit
1 = Indicates that the Low Voltage Detect logic will generate the interrupt flag at the
0 = Indicates that the Low Voltage Detect logic will not generate the interrupt flag at the
LVDEN: Low-voltage Detect Power Enable bit
1 = Enables LVD, powers up LVD circuit
0 = Disables LVD, powers down LVD circuit
LVDL3:LVDL0: Low Voltage Detection Limit bits
1111 = External analog input is used (input comes from the LVDIN pin)
1110 = 4.5V min - 4.77V max.
1101 = 4.2V min - 4.45V max.
1100 = 4.0V min - 4.24V max.
1011 = 3.8V min - 4.03V max.
1010 = 3.6V min - 3.82V max.
1001 = 3.5V min - 3.71V max.
1000 = 3.3V min - 3.50V max.
0111 = 3.0V min - 3.18V max.
0110 = 2.8V min - 2.97V max.
0101 = 2.7V min - 2.86V max.
0100 = 2.5V min - 2.65V max.
0011 = 2.4V min - 2.54V max.
0010 = 2.2V min - 2.33V max.
0001 = 2.0V min - 2.12V max.
0000 = 1.8V min - 1.91V max.
Legend:
R = Readable bit
U = Unimplemented bit, read as ‘0’
Note:
U-0
—
specified voltage range.
specified voltage range and the LVD interrupt should not be enabled
LVDL3:LVDL0 modes which result in a trip point below the valid operating voltage
of the device are not tested.
U-0
—
W = Writable bit
IRVST
R-0
LVDEN
R/W-0
Preliminary
- n = Value at POR reset
LVDL3
R/W-0
LVDL2
R/W-1
LVDL1
R/W-0
PIC18CXX2
bit 0
LVDL0
R/W-1
DS39026B-page 177