HD64336901G Renesas Technology, HD64336901G Datasheet - Page 299

• Manufacturer Part Number: HD64336901G
• Description: (HD64xxx Series) 16-BIT MICROCONTROLLER
• Manufacturer: Renesas Technology

Table 17.1 LVDCR Settings and Select Functions
Notes: 1. Set these bits if necessary.
17.2.2
LVDSR indicates whether the power-supply voltage falls below or rises above the respective
given values.
Note:
LVDE BGRE VDDII LVDSEL LVDRE LVDDE LVDUE
0
1
1
1
1
Bit
7 to 2
1
0
*
1
1
1
1
2. Settings are ignored.
* Initialized by an LVDR.
1
Low-Voltage-Detection Status Register (LVDSR)
Bit Name
LVDDF
LVDUF
*
*
*
*
*
2
1
1
1
1
LVDCR Settings
*
1
0
0
0
Initial
Value
All 1
0*
0*
2
*
1
0
0
1
2
R/W
R/W
R/W
*
0
1
1
1
2
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
*
0
0
1
1
2
Power-On
Reset
Rev. 1.00, 11/03, page 271 of 376
LVDR
Select Functions
Low-
Voltage-
Detection
Fall
Interrupt
Low-
Voltage-
Detection
Rise
Interrupt