MC908QT1 FREESCALE [Freescale Semiconductor, Inc], MC908QT1 Datasheet - Page 85
MC908QT1
Manufacturer Part Number
MC908QT1
Description
Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.MC908QT1.pdf
(184 pages)
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Chapter 10
Low-Voltage Inhibit (LVI)
10.1 Introduction
This section describes the low-voltage inhibit (LVI) module, which monitors the voltage on the V
and can force a reset when the V
10.2 Features
Features of the LVI module include:
10.3 Functional Description
Figure 10-1
user selectable options found in the configuration register (CONFIG1). See
Register
The LVI is enabled out of reset. The LVI module contains a bandgap reference circuit and comparator.
Clearing the LVI power disable bit, LVIPWRD, enables the LVI to monitor V
reset disable bit, LVIRSTD, enables the LVI module to generate a reset when V
Freescale Semiconductor
•
•
•
•
Programmable LVI reset
Programmable power consumption
Selectable LVI trip voltage
Programmable stop mode operation
(CONFIG).
shows the structure of the LVI module. LVISTOP, LVIPWRD, LVI5OR3, and LVIRSTD are
FROM CONFIG
DETECTOR
LVI5OR3
LOW V
V
DD
DD
Figure 10-1. LVI Module Block Diagram
V
V
MC68HC908QY/QT Family Data Sheet, Rev. 5
DD
DD
DD
FROM CONFIG
> LVITRIP = 0
≤ LVITRIP = 1
voltage falls below the LVI trip falling voltage, V
LVIPWRD
LVIOUT
STOP INSTRUCTION
FROM CONFIG
LVIRSTD
FROM CONFIG
DD
Chapter 5 Configuration
LVI RESET
LVISTOP
voltage. Clearing the LVI
DD
falls below a voltage,
TRIPF
.
DD
pin
85
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