HD64336900G Datasheet, PDF (299/408 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series

Table 17.1 LVDCR Settings and Select Functions
LVDCR Settings
Select Functions
LVDE BGRE VDDII LVDSEL LVDRE LVDDE
0
*¹
*²
*²
*²
*²
1
1
*¹
1
1
0
1
1
*¹
0
0
1
1
1
*¹
0
0
1
1
1
*¹
0
1
1
Notes: 1. Set these bits if necessary.
2. Settings are ignored.
LVDUE
*²
0
0
1
1
Power-On
Reset
LVDR
√

√
√
√

√

√
√
Low-
Voltage-
Detection
Fall
Interrupt


√
√
√
Low-
Voltage-
Detection
Rise
Interrupt



√
√
17.2.2 Low-Voltage-Detection Status Register (LVDSR)
LVDSR indicates whether the power-supply voltage falls below or rises above the respective
given values.
Initial
Bit
Bit Name Value R/W
7 to 2 
All 1

1
LVDDF 0*
R/W
0
LVDUF 0*
R/W
Note: * Initialized by an LVDR.
Description
Reserved
These bits are always read as 1 and cannot be modified.
LVD Power-Supply Voltage Fall Flag
[Setting condition]
When the power-supply voltage falls below Vint (D)
(Typ. = 3.7 V)
[Clearing condition]
When writing 0 to this bit after reading it as 1
LVD Power-Supply Voltage Rise Flag
[Setting condition]
When the power supply voltage falls below Vint (D) while
the LVDUE bit in LVDCR is set to 1 and then rises above
Vint (U) (Typ. = 4.0 V) before falling below Vreset1 (Typ.
= 2.3 V)
[Clearing condition]
When writing 0 to this bit after reading it as 1
Rev. 1.00, 11/03, page 271 of 376