mc68hc908kx8 Freescale Semiconductor, Inc, mc68hc908kx8 Datasheet - Page 101

• Manufacturer Part Number: mc68hc908kx8
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

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
V
Freescale Semiconductor
TRIPF
•
•
•
•
Programmable LVI reset
Programmable power consumption
Selectable LVI trip voltage
Programmable stop mode operation
. Setting the LVI enable in stop mode bit, LVISTOP, enables the LVI to operate in stop mode.
(CONFIG).
shows the structure of the LVI module. LVISTOP, LVIPWRD, LVI5OR3, and LVIRSTD are
FROM CONFIG
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 Data Sheet, Rev. 2.1
DETECTOR
LVI5OR3
LOW V
V
DD
DD
Figure 10-1. LVI Module Block Diagram
V
V
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
DD
Chapter 4 Configuration
FROM CONFIG
LVI RESET
LVISTOP
voltage. Clearing the LVI
DD
falls below a voltage,
TRIPF
.
DD
pin
101