HD64F38024HV Datasheet, PDF (456/684 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip Microcomputer H8 Family/H8/300L Super Low Power Series

Section 14 Power-On Reset and Low-Voltage Detection Circuits (H8/38124 Group Only)
LVDCR is an 8-bit read/write register. It is used to control whether or not the low-voltage
detection circuit is used, settings for external input of power supply rise and drop detection
voltages, the LVDR detection level setting, enabling or disabling of resets triggered by the low-
voltage detection reset circuit (LVDR), and enabling or disabling of interrupts triggered by power
supply voltage drops or rises.
Bit 7—LVD Enable (LVDE)
This bit is used to control whether or not the low-voltage detection circuit is used.
Bit 7
LVDE
0
1
Description
Low-voltage detection circuit not used (standby status)
Low-voltage detection circuit used
(initial value)
Bit 6—Reserved
This bit is a read/write enabled reserved bit.
Bit 5—Power Supply Drop (LVDD) Detection Level External Input Select (VINTDSEL)
This bit is used to select the power supply drop detection level.
Bit 5
VINTDSEL
0
1
Description
LVDD detection level generated by on-chip ladder resistor
LVDD detection level input to extD pin
(initial value)
Bit 4—Power Supply Rise (LVDU) Detection Level External Input Select (VINTUSEL)
This bit is used to select the power supply rise detection level.
Bit 4
VINTUSEL
0
1
Description
LVDU detection level generated by on-chip ladder resistor
LVDU detection level input to extU pin
(initial value)
Rev. 8.00 Mar. 09, 2010 Page 434 of 658
REJ09B0042-0800