mc68hc908jw32 Freescale Semiconductor, Inc, mc68hc908jw32 Datasheet - Page 199

• Manufacturer Part Number: mc68hc908jw32
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 17
Low-Voltage Inhibit (LVI)
17.1 Introduction
This section describes the low-voltage inhibit (LVI) module. The LVI module monitors the voltage on the
V
17.2 Features
Features of the LVI module include:
17.3 Functional Description
Figure 17-2
contains independent bandgap reference circuit and comparator for monitoring the V
reset performs a MCU internal reset and drives the RST pin low to provide low-voltage protection to
external peripheral devices.
LVISTOP, LVIPWRD, LVIRSTD are in the CONFIG1 register. See
(CONFIG)
until V
the state of the LVIOUT flag in the LVI status register (LVISR).
An LVI reset also drives the RST pin low to provide low-voltage protection to external peripheral devices.
Freescale Semiconductor
$FE0F
Addr.
DD
•
•
•
•
pin, and can force a reset when V
DD
Independent voltage monitoring circuits for V
Independent LVI circuit disable for V
Programmable LVI reset
Programmable stop mode operation
rises above V
for details of the LVI configuration bits. Once an LVI reset occurs, the MCU remains in reset
Register Name
shows the structure of the LVI module. The LVI is enabled out of reset. The LVI module
LVI Status Register
(LVISR)
TRIPR1
Reset:
Read:
Write:
which causes the MCU to exit reset. The output of the comparator controls
Figure 17-1. LVI I/O Register Summary
LVIOUT
Bit 7
MC68HC908JW32 Data Sheet, Rev. 5
0
DD
voltage falls below V
= Unimplemented
DD
6
0
0
DD
5
0
0
TRIPF1
4
0
0
Chapter 3 Configuration Registers
.
3
0
0
2
0
0
DD
voltage. An LVI
1
0
0
Bit 0
0
0
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