Datasheet

Section 19 Band-Gap Circuit, Power-On Reset, and Low-Voltage Detection Circuits
Rev. 3.00 Sep. 10, 2007 Page 383 of 528
REJ09B0216-0300
Bit Bit Name
Initial
Value
R/W Description
1 LVDDE 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 LVDUE 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
Notes: 1. Not initialized by an LVDR but initialized by a power-on reset or a watchdog timer reset.
2. For 3.3-V-specification models, this bit 3 of this register is a reserved bit (initial value is
0) and the reset detection voltage is 2.3 V (typ.).
Table 19.1 LVDCR Settings and Select Functions
LVDCR Settings Select Functions
VDDII LVDSEL LVDDE LVDUE
Power-On
Reset
LVDR
Low-Voltage-
Detection Fall
Interrupt
Low-Voltage-
Detection Rise
Interrupt
* 1 0 0 √ √  
* 0 1 0 √ √ √ 
* 0 1 1 √ √ √ √
Note: * Set these bits if necessary.