US38024-BAG1 Renesas Electronics America, US38024-BAG1 Datasheet - Page 458

• Manufacturer Part Number: US38024-BAG1
• Description: DEV EVALUATION KIT H8/38024
• Manufacturer: Renesas Electronics America
• Series: H8®r
• Type: MCUr

Specifications of US38024-BAG1

• Contents: 2G (Second-generation) Evaluation Board, HEW debugger support, Cable and CD-ROM
• For Use With/related Products: H8/38024
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Section 14 Power-On Reset and Low-Voltage Detection Circuits (H8/38124 Group Only)
Table 14.3 shows the relationship between LVDCR settings and function selections. Refer to table
14.3 when making settings to LVDCR.
Table 14.3 LVDCR Settings and Function Selections
LVDE
0
1
1
1
1
Note: Setting values marked with an asterisk (*) are invalid.
14.2.2
Note: * These bits initialized by resets trigged by LVDR.
LVDSR is an 8-bit read/write register. It is used to control external input selection, indicates when
the reference voltage is stable, and indicates if the power supply voltage goes below or above a
specified range.
Bit 7—LVD Reference Voltage Stabilized Flag (OVF)
This bit indicates when the low-voltage detection counter (LVDCNT) overflows.
Bit 7
OVF
0
1
Rev. 8.00 Mar. 09, 2010 Page 436 of 658
REJ09B0042-0800
Bit
Initial value
Read/Write
LVDSEL LVDRE LVDDE LVDUE
*
1
0
0
0
Low-Voltage Detection Status Register (LVDSR)
LVDCR Setting Value
Description
[Clearing condition]
When 0 is written after reading 1
[Setting condition]
When the low-voltage detection counter (LVDCNT) overflows
*
1
0
0
1
OVF
R/W
0 *
7
*
0
1
1
1
R/W
—
6
0
*
0
0
1
1
R/W
—
5
0
Power-on
Reset
R/W
—
4
0
Low-Voltage
Detection
Reset
—
—
—
VREFSEL
R/W
3
0
Low-Voltage
Detection
Voltage Drop
Interrupt
—
—
R/W
—
2
0
LVDDF
R/W
0 *
1
Low-Voltage
Detection
Voltage Rise
Interrupt
—
—
—
(initial value)
LVDUF
R/W
0 *
0