Datasheet

78K0/Ix2 CHAPTER 22 LOW-VOLTAGE DETECTOR
R01UH0010EJ0500 Rev.5.00 637
Feb 28, 2012
(2) When LVI default start function enabled is set (LVISTART = 1)
The setting when operation starts and when operation stops is the same as described in 22.4.1 (1) When LVI default
start function stopped is set (LVISTART = 0).
Figure 22-5. Timing of Low-Voltage Detector Internal Reset Signal Generation (LVISTART = 1)
<1>
<5>
<6>
<4>Wait time
<2>
<3>
Internal reset signal
Supply voltage (V
DD)
LVIMK flag
(set by software)
LVION flag
(set by software)
LVIF flag
LVIMD flag
(set by software)
LVIRF flag
Note 3
LVI reset signal
POC reset signal
V
LVI = 1.91 V (TYP.)
V
POR = 1.61 V (TYP.)
V
PDR = 1.59 V (TYP.)
V
LVI
H
Note 1
Time
Cleared
Cleared
Cleared
Not cleared
Not cleared
Cleared by
software
Cleared by
software
Note 2
Set LVI to be
used for reset
Not cleared
Not cleared
Notes 1. The LVIMK flag is set to “1” by reset signal generation.
2. The LVIIF flag of the interrupt request flag registers and the LVIF flag may be set (1).
3. LVIRF is bit 0 of the reset control flag register (RESF).
For details of RESF, refer to CHAPTER 20 RESET FUNCTION.
Remarks 1. <1> to <6> in Figure 22-5 above correspond to <1> to <6> in the description of “When starting
operation” in 22.4.1 (1) When LVI default start function stopped is set (LVISTART = 0).
2. V
POR: POC power supply rise detection voltage
V
PDR: POC power supply fall detection voltage