PIC16C773 Microchip Technology, PIC16C773 Datasheet - Page 113
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PIC16C773
Manufacturer Part Number
PIC16C773
Description
28/40-Pin/ 8-Bit CMOS Microcontrollers w/ 12-Bit A/D
Manufacturer
Microchip Technology
Datasheet
1.PIC16C773.pdf
(200 pages)
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10.0
The Voltage Reference module provides reference volt-
ages for the Brown-out Reset circuitry, the Low-voltage
Detect circuitry and the A/D converter.
FIGURE 10-1: LVDCON: LOW-VOLTAGE DETECT CONTROL REGISTER
1999 Microchip Technology Inc.
bit 7-6: Unimplemented: Read as '0'
bit 5:
bit 4:
bit 3-0: LV3:LV0: Low Voltage Detection Limit bits
Note 1: These are the minimum trip points for the LVD, see Table 15-3 for the trip point tolerances. Selection
bit7
U-0
—
VOLTAGE REFERENCE
MODULE AND LOW-VOLTAGE
DETECT
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
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
of an unused setting may result in an inadvertant interrupt.
U-0
—
BGST
R-0
LVDEN
R/W-0
Advance Information
R/W-0
LV3
(1)
R/W-1
LV2
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
Figure 10-2.
R/W-0
LV1
REFCON,
R/W-1
LV0
bit0
as
shown
PIC16C77X
R = Readable bit
W = Writable bit
U = Unimplemented bit,
- n =Value at POR reset
read as ‘0’
in
DS30275A-page 113
Figure 10-1
and
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