PIC16C770 Microchip Technology Inc., PIC16C770 Datasheet - Page 103
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PIC16C770
Manufacturer Part Number
PIC16C770
Description
18/20-pin, 8-bit Cmos Microcontrollers With 10/12-bit A/d
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC16C770.pdf
(220 pages)
- Current page: 103 of 220
- Download datasheet (4Mb)
10.0
The Voltage Reference module provides reference
voltages for the Brown-out Reset circuitry, the Low-volt-
age Detect circuitry and the A/D converter.
REGISTER 10-1: LOW-VOLTAGE DETECT CONTROL REGISTER (LVDCON: 9Ch)
2002 Microchip Technology Inc.
VOLTAGE REFERENCE
MODULE AND LOW-VOLTAGE
DETECT
bit 7-6
bit 5
bit 4
bit 3-0
Unimplemented: Read as '0'
BGST: Bandgap Stable Status Flag bit
1 = Indicates that the bandgap voltage is stable, and LVD interrupt is reliable
0 = Indicates that the bandgap voltage is not stable, and LVD interrupt should not be enabled
LVDEN: Low-voltage Detect Power Enable bit
1 = Enables LVD, powers up bandgap circuit and reference generator
0 = Disables LVD, powers down bandgap circuit if unused by BOR or VRH/VRL
LV<3:0>: Low Voltage Detection Limit bits
1111 = External analog input is used
1110 = 4.5V
1101 = 4.2V
1100 = 4.0V
1011 = 3.8V
1010 = 3.6V
1001 = 3.5V
1000 = 3.3V
0111 = 3.0V
0110 = 2.8V
0101 = 2.7V
0100 = 2.5V
0011 = Reserved. Do not use.
0010 = Reserved. Do not use.
0001 = Reserved. Do not use.
0000 = Reserved. Do not use.
bit 7
Legend:
R = Readable bit
- n = Value at POR
Note:
U-0
—
These are the minimum trip points for the LVD. See Table 15-8 for the trip point tol-
erances. Selection of reserved setting may result in an inadvertent interrupt.
U-0
—
BGST
R-0
W = Writable bit
’1’ = Bit is set
LVDEN
R/W-0
The source for the reference voltages comes from the
bandgap reference circuit. The bandgap circuit is ener-
gized anytime the reference voltage is required by the
other sub-modules, and is powered down when not in
use. The control registers for this module are LVDCON
and REFCON, as shown in Register 10-1 and
Figure 10-2.
(1)
PIC16C717/770/771
R/W-0
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
LV3
R/W-1
LV2
x = Bit is unknown
R/W-0
LV1
DS41120B-page 101
R/W-1
LV0
bit 0
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