Hitachi H*/3694F-ZTAT User Manual
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Rev. 1.0, 07/01, page 267 of 372
Bit
Bit Name
Initial
Value
Value
R/W
Description
7
LVDE
0
R/W
LVD Enable
0: The low-voltage detection circuit is not used. (In standby
mode)
1: The low-voltage detection circuit is used.
6 to 4
−
1
−
Reserved
These bits are always read as 1, and cannot be modified.
3
LVDSEL
0
R/W
LVDI Detection Level Select
0: When the voltage falls below 3.6 V (typ.) or rises above 3.9 V
(typ.)
1: When the voltage falls below 3.2 V (typ.) or rises above 3.5 V
(typ.)
2
LVDRE
0
R/W
LVDR Enable
0: Disables the LVDR function
1: Enables the LVDR function
1
LVDDE
0
R/W
Voltage-Fall-Interrupt Enable
0: Interrupt on the power-supply voltage falling below the
selected detection level enabled
1: Interrupt on the power-supply voltage falling below the
selected detection level disabled
0
LVDUE
0
R/W
Voltage-Rise-Interrupt Enable
0: Interrupt on the power-supply voltage rising above the
selected detection level enabled
1: Interrupt on the power-supply voltage rising above the
selected detection level disabled