PIC18F258 MICROCHIP [Microchip Technology], PIC18F258 Datasheet - Page 259

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

23.1
The Low Voltage Detect Control register controls the
operation of the Low Voltage Detect circuitry.
REGISTER 23-1:
2002 Microchip Technology Inc.
Control Register
bit 7-6
bit 5
bit 4
bit 3-0
LVDCON 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 = Reserved
Note:
Legend:
R = Readable bit
- n = Value at POR
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
—
IRVST
Preliminary
R-0
W = Writable bit
’1’ = Bit is set
LVDEN
R/W-0
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
LVDL3
R/W-0
LVDL2
R/W-1
PIC18FXX8
x = Bit is unknown
LVDL1
R/W-0
DS41159B-page 257
LVDL0
R/W-1
bit 0