FUJITSU MB91460 SERIES FR60 User Manual
Page 993
977
Chapter 51 Low Voltage Reset/Interrupt
3.Registers
• LVSEL: Address 04C4h (Access: Byte, Halfword, Word)
Meaning of Bit Attribute Symbols (Page No.10)
” for details of the attributes.)
• Bit7-4: External LV detection voltage level
• Bit3-0: Internal LV detection voltage level
Note: The set level of the Internal Low Voltage Detection is only effective in case of Main Regulator is
switched off (for decreasing the trigger level when decreasing the sub regulator voltage). Otherwise (with
main regulator on) the default level is applied internally by hardware to the low voltage detection module
(the register setting is not changed in this case and will be applied next time the main regulator is switched
off).
7
6
5
4
3
2
1
0
bit
LVESEL3
LVESEL2
LVESEL1
LVESEL0
LVISEL3
LVISEL2
LVISEL1
LVISEL0
0
0
0
0
0
1
1
1
Initial value (
INIT pin input,
watchdog reset
)
X
X
X
X
X
X
X
X
Initial value
(Software reset)
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Attribute
LVESEL3-LVESEL0
Trigger level
1001
4.2V +/- 0.1V
1000
4.1V +/- 0.1V
0111
4.0V +/- 0.1V
0110
3.9V +/- 0.1V
0101
3.8V +/- 0.1V
0100
3.7V +/- 0.1V
0011
3.6V +/- 0.1V
0010
3.2V +/- 0.1V
0001
3.0V +/- 0.1V
0000
2.8V +/- 0.1V (initial)
LVISEL3-LVISEL0
Trigger level
0111
1.6V +/- 0.1V (initial)
0110
1.5V +/- 0.1V
0101
1.4V +/- 0.1V
0100
1.3V +/- 0.1V
0011
1.2V +/- 0.1V
0010
1.1V +/- 0.1V
0001
1.0V +/- 0.1V
0000
0.9V +/- 0.1V