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PIC18F258-E/LSQTP Datasheet(PDF) 263 Page - Microchip Technology

Part # PIC18F258-E/LSQTP
Description  28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module
PDF  402 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC18F258-E/LSQTP Datasheet(HTML) 263 Page - Microchip Technology

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© 2006 Microchip Technology Inc.
DS41159E-page 261
PIC18FXX8
23.1
Control Register
The Low-Voltage Detect Control register controls the
operation of the Low Voltage Detect circuitry.
REGISTER 23-1:
LVDCON: LOW-VOLTAGE DETECT CONTROL REGISTER
U-0
U-0
R-0
R/W-0
R/W-0
R/W-1
R/W-0
R/W-1
—
—
IRVST
LVDEN
LVDL3
LVDL2
LVDL1
LVDL0
bit 7
bit 0
bit 7-6
Unimplemented: Read as ‘0’
bit 5
IRVST: Internal Reference Voltage Stable Flag bit
1
= Indicates that the Low-Voltage Detect logic will generate the interrupt flag at the specified
voltage range
0
= Indicates that the Low-Voltage Detect logic will not generate the interrupt flag at the
specified voltage range and the LVD interrupt should not be enabled
bit 4
LVDEN: Low-Voltage Detect Power Enable bit
1
= Enables LVD, powers up LVD circuit
0
= Disables LVD, powers down LVD circuit
bit 3-0
LVDL3:LVDL0: Low-Voltage Detection Limit bits
1111
= External analog input is used (input comes from the LVDIN pin)
1110
= 4.45V min.-4.83V max.
1101
= 4.16V min.-4.5V max.
1100
= 3.96V min.-4.2V max.
1011
= 3.76V min.-4.08V max.
1010
= 3.57V min.-3.87V max.
1001
= 3.47V min.-3.75V max.
1000
= 3.27V min.-3.55V max.
0111
= 2.98V min.-3.22V max.
0110
= 2.77V min.-3.01V max.
0101
= 2.67V min.-2.89V max.
0100
= 2.48V min.-2.68V max.
0011
= 2.37V min.-2.57V max.
0010
= 2.18V min.-2.36V max.
0001
= 1.98V min.-2.14V max.
0000
= Reserved
Note:
LVDL3:LVDL0 modes, which result in a trip point below the valid operating voltage
of the device, are not tested.
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown



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