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MC908QC8CDRE Datasheet(PDF) 93 Page - Freescale Semiconductor, Inc

No. de Pieza. MC908QC8CDRE
Descripción  M68HC08 Microcontrollers
Descarga  274 Pages
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Fabricante  FREESCALE [Freescale Semiconductor, Inc]
Página de inicio  http://www.freescale.com
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MC908QC8CDRE Datasheet(HTML) 93 Page - Freescale Semiconductor, Inc

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MC68HC908QC16 • MC68HC908QC8 • MC68HC908QC4 Data Sheet, Rev. 5
Freescale Semiconductor
93
Chapter 9
Low-Voltage Inhibit (LVI)
9.1 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 Chapter 4 Configuration Registers (CONFIG1 and CONFIG2)) contain
control bits for this module.
9.2 Features
Features of the LVI module include:
Programmable LVI reset
Selectable LVI trip voltage
Programmable stop mode operation
9.3 Functional Description
Figure 9-1 shows the structure of the LVI module. LVISTOP, LVIPWRD, LVITRIP, and LVIRSTD are user
selectable options found in the configuration register.
Figure 9-1. LVI Module Block Diagram
LOW VDD
DETECTOR
LVIPWRD
STOP INSTRUCTION
LVISTOP
LVI RESET
LVIOUT
0 IF VDD > VTRIPR
1 IF VDD ≤ VTRIPF
FROM CONFIGURATION REGISTER
VDD
LVIRSTD
LVITRIP
FROM CONFIGURATION REGISTER
FROM CONFIGURATION REGISTER
FROM CONFIGURATION REGISTER


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