参数资料
型号: MC68HC08QT2VDW
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO8
封装: EIAJ, SOIC-8
文件页数: 161/178页
文件大小: 2311K
代理商: MC68HC08QT2VDW
MC68HC08QY/QT Family Data Sheet, Rev. 1
Freescale Semiconductor
83
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 Chapter 5 Configuration Register (CONFIG)) contain control bits for this
module.
10.2 Features
Features of the LVI module include:
Programmable LVI reset
Selectable LVI trip voltage
Programmable stop mode operation
10.3 Functional Description
Figure 10-1 shows the structure of the LVI module. LVISTOP, LVIPWRD, LVITRIP, and LVIRSTD are
user selectable options found in the configuration register.
Figure 10-1. 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
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