HD6473847RHV Datasheet, PDF (380/546 Pages) Renesas Technology Corp – Renesas 8-Bit Single-Chip Microcomputer H8 Family / H8/300L Super Low Power Series

Section 14 Power-On Reset and Low-Voltage Detection Circuits (H8/38104 Group Only)
Initial
Bit Bit Name Value R/W Description
3
LVDSEL 0^*
R/W LVDR Detection Level Select
0: Reset detection voltage 2.3 V (typ.)
1: Reset detection voltage 3.3 V (typ.)
Select 2.3 V (typical) reset if voltage rise and drop
detection interrupts are to be used. For reset detection
only, Select 3.3 V (typical) reset.
2
LVDRE
0^*
R/W LVDR Enable
0: LVDR resets disabled
1: LVDR resets enabled
1
LVDDE
0
R/W Voltage Drop Interrupt Enable
0: Voltage drop interrupt requests disabled
1: Voltage drop interrupt requests enabled
0
LVDUE
0
R/W Voltage Rise Interrupt Enable
0: Voltage rise interrupt requests disabled
1: Voltage rise interrupt requests enabled
Note: * These bits are not initialized by resets trigged by LVDR. They are initialized by power-on
resets and watchdog timer resets.
Table 14.1 LVDCR Settings and Select Functions
LVDCR Settings
LVDE LVDSEL LVDRE LVDDE
0
*
*
*
1
1
1
0
1
0
0
1
1
0
0
1
1
0
1
1
Legend: * means invalid.
LVDUE
*
0
0
1
1
Power-On
Reset
O
O
O
O
O
Select Functions
LVDR
Low-Voltage- Low-Voltage-
Detection Detection
Falling
Rising
Interrupt
Interrupt
⎯
⎯
⎯
O
⎯
⎯
⎯
O
⎯
⎯
O
O
O
O
O
Rev. 7.00 Mar. 08, 2010 Page 348 of 510
REJ09B0024-0700