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PIC18F4539-E/MLSQTP Datasheet(PDF) 193 Page - Microchip Technology

Part # PIC18F4539-E/MLSQTP
Description  Enhanced FLASH Microcontrollers with Single Phase Induction Motor Control Kernel
PDF  322 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC18F4539-E/MLSQTP Datasheet(HTML) 193 Page - Microchip Technology

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 2002 Microchip Technology Inc.
Preliminary
DS30485A-page 191
PIC18FXX39
19.1
Control Register
The Low Voltage Detect Control register controls the
operation of the Low Voltage Detect circuitry.
REGISTER 19-1:
LVDCON 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
= 4.5V - 4.77V
1101
= 4.2V - 4.45V
1100
= 4.0V - 4.24V
1011
= 3.8V - 4.03V
1010
= 3.6V - 3.82V
1001
= 3.5V - 3.71V
1000
= 3.3V - 3.50V
0111
= 3.0V - 3.18V
0110
= 2.8V - 2.97V
0101
= 2.7V - 2.86V
0100
= 2.5V - 2.65V
0011
= 2.4V - 2.54V
0010
= 2.2V - 2.33V
0001
= 2.0V - 2.12V
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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