HD64F3694HV Datasheet, PDF (321/452 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series

Section 18 Power-On Reset and Low-Voltage Detection Circuits (Optional)
Table 18.1 shows the relationship between the LVDCR settings and select functions. LVDCR
should be set according to table 18.1.
Initial
Bit Bit Name Value R/W Description
7
LVDE
0*
R/W LVD Enable
0: The low-voltage detection circuit is not used (In
standby mode)
1: The low-voltage detection circuit is used
6 to 4 
All 1

Reserved
These bits are always read as 1, and cannot be modified.
3
LVDSEL 0*
R/W LVDR Detection Level Select
0: Reset detection voltage is 2.3 V (typ.)
1: Reset detection voltage is 3.6 V (typ.)
When the falling or rising voltage detection interrupt is
used, reset detection voltage of 2.3 V (typ.) should be
used. When only a reset detection interrupt is used, reset
detection voltage of 3.6 V (typ.) should be used.
2
LVDRE 0*
R/W LVDR Enable
0: Disables the LVDR function
1: Enables the LVDR function
1
LVDDE 0
R/W Voltage-Fall-Interrupt Enable
0: Interrupt on the power-supply voltage falling below the
selected detection level disabled
1: Interrupt on the power-supply voltage falling below the
selected detection level enabled
0
LVDUE 0
R/W Voltage-Rise-Interrupt Enable
0: Interrupt on the power-supply voltage rising above the
selected detection level disabled
1: Interrupt on the power-supply voltage rising above the
selected detection level enabled
Note: * Not initialized by LVDR but initialized by a power-on reset or WDT reset.
Rev.5.00 Nov. 02, 2005 Page 291 of 418
REJ09B0028-0500