Table 17.1 Lvdcr Settings And Select Functions - Renesas H8 Series Hardware Manual

Bit Bit Name
3 LVDSEL
2 LVDRE
1 LVDDE
0 LVDUE
Note: * Not initialized by an LVDR but initialized by a power-on reset or a watchdog timer reset.

Table 17.1 LVDCR Settings and Select Functions

LVDCR Settings
LVDE BGRE VDDII LVDSEL LVDRE
1 2
0 * *
1
1 1 *
1
1 1 *
1
1 1
*
1
1 1
*
Notes: 1. Set these bits if necessary.
2. Settings are ignored.
Section 17 Band-Gap Circuit, Power-On Reset, and Low-Voltage Detection Circuits
Initial
Value R/W Description
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, the 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.
1* R/W LVDR Enable
0: Disables an LVDR
1: Enables an LVDR
0 R/W Voltage-Fall-Interrupt Enable
0: Interrupt on the power-supply voltage falling disabled
1: Interrupt on the power-supply voltage falling enabled
0 R/W Voltage-Rise-Interrupt Enable
0: Interrupt on the power-supply voltage rising disabled
1: Interrupt on the power-supply voltage rising enabled
LVDDE
2 2 2
* * *
1 1 0
0 0 1
0 0 1
0 1 1
Power-On
LVDUE Reset LVDR
√ 
2
*
√ √
0
√ 
0
√ 
1
√ √
1
Rev. 3.00 Sep. 14, 2006 Page 289 of 408
Select Functions
Low- Low-
Voltage- Voltage-
Detection Detection
Fall Rise
Interrupt Interrupt
 
 
√ 
√ √
√ √
REJ09B0105-0300