Fujitsu FR81S Benutzerhandbuch
CHAPTER 32: LOW-VOLTAGE DETECTION (EXTERNAL
LOW-VOLTAGE DETECTION)
1. Overview
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : LOW-VOLTAGE DETECTION (EXTERNAL LOW-VOLTAGE DETECTION)
FUJITSU SEMICONDUCTOR CONFIDENTIAL
3
1. Overview
This section gives an overview of the low-voltage detection (external low-voltage detection).
The external low-voltage detection is the function that monitors external voltage and detects a fall of the
power supply voltage below the low-voltage detection voltage level.
Figure 1-1 Block Diagram
Note: Rising LVDV: 2.3V
Falling LVDV: 2.8 to 4.3V (11 steps) variable
Voltage
detection circuit
LVDV ± 8%
External Low-Voltage
Detection
(To reset control circuit)
MB91520 Series
MN705-00010-1v0-E
1154