mc68hc908qb4 Freescale Semiconductor, Inc, mc68hc908qb4 Datasheet - Page 89

• Manufacturer Part Number: mc68hc908qb4
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 10
Low-Voltage Inhibit (LVI)
10.1 Introduction
The low-voltage inhibit (LVI) module is provided as a system protection mechanism to prevent the MCU
from operating below a certain operating supply voltage level. The module has several configuration
options to allow functionality to be tailored to different system level demands.
The configuration registers (see
module.
10.2 Features
Features of the LVI module include:
10.3 Functional Description
Figure 10-1
user selectable options found in the configuration register.
Freescale Semiconductor
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•
•
Programmable LVI reset
Selectable LVI trip voltage
Programmable stop mode operation
shows the structure of the LVI module. LVISTOP, LVIPWRD, LVITRIP, and LVIRSTD are
FROM CONFIGURATION REGISTER
DETECTOR
LVITRIP
LOW V
V
DD
DD
FROM CONFIGURATION REGISTER
Figure 10-1. LVI Module Block Diagram
0 IF V
1 IF V
Chapter 5 Configuration Register
DD
DD
LVIPWRD
MC68HC908QB8 Data Sheet, Rev. 2
> V
≤ V
TRIPR
TRIPF
LVIOUT
FROM CONFIGURATION REGISTER
STOP INSTRUCTION
LVIRSTD
FROM CONFIGURATION REGISTER
(CONFIG)) contain control bits for this
LVISTOP
LVI RESET
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