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18F8680 Datasheet(PDF) 273 Page - Microchip Technology

Part # 18F8680
Description  64/68/80-Pin High-Performance, 64-Kbyte Enhanced Flash Microcontrollers with ECAN Module
PDF  496 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

18F8680 Datasheet(HTML) 273 Page - Microchip Technology

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 2004 Microchip Technology Inc.
DS30491C-page 271
PIC18F6585/8585/6680/8680
22.1
Control Register
The Low-Voltage Detect Control register controls the
operation of the Low-Voltage Detect circuitry.
REGISTER 22-1:
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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