Fujitsu FR81S User Manual
CHAPTER 32: LOW-VOLTAGE DETECTION (EXTERNAL
LOW-VOLTAGE DETECTION)
4. Registers
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : LOW-VOLTAGE DETECTION (EXTERNAL LOW-VOLTAGE DETECTION)
FUJITSU SEMICONDUCTOR CONFIDENTIAL
7
4.1. External Low-Voltage Detection Rise Detection
Register : LVD5R (Low-Voltage Detect external 5v Rise
register)
register)
The bit configuration of the external low-voltage detection rise detection register (LVD5R) is
explained.
This register is used in order to clear the low-voltage detection reset flag, etc.
LVD5R : Address 0584
H
(Access: Byte, Half-word, Word)
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
Reserved
LVD5R_F
Initial value
0
0
0
0
0
0
0
1
Attribute R0,WX
R0,WX R0,WX R0,WX
R0,WX
R0,WX
R0,WX R(RM1), W
[bit7 to bit1] Reserved
[bit0] LVD5R_F (Low Voltage Detect external 5v Rise Flag): External voltage rise detection flag
This bit is an external voltage rise detection flag.
LVD5R_F
External power supply rise detection flag
Read
Write
0
Not detected
Clear the flag
1
Detected
No effect on operation
If a rise in external voltage is detected, the LVD5R_F bit is set to "1".
The bit will be cleared when external reset is input.
MB91520 Series
MN705-00010-1v0-E
1158