hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 480

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

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
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
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
Rev. 7.00 Mar 10, 2005 page 438 of 652
REJ09B0042-0700
Description
Low-voltage detection circuit not used (standby status)
Low-voltage detection circuit used
Description
LVDD detection level generated by on-chip ladder resistor
LVDD detection level input to extD pin
Description
LVDU detection level generated by on-chip ladder resistor
LVDU detection level input to extU pin
(initial value)
(initial value)
(initial value)