CHAPTER 19 LOW-VOLTAGE DETECTOR
Preliminary User’s Manual U16846EJ1V0UD
326
Figure 19-4. Timing of Low-Voltage Detector Internal Reset Signal Generation
Supply voltage (V
DD
)
LVI detection voltage
(V
LVI
)
POC detection voltage
(V
POC
)
<2>
Time
LVIMK flag
(set by software)
LVIF flag
LVIRF flag
Note 3
Note 2
LVI reset signal
POC reset signal
Internal reset signal
Cleared by
software
Not cleared
Not cleared
Not cleared
Not cleared
Cleared by
software
<5>
<6>
Clear
Clear
Clear
<4> 0.2 ms or longer
LVION flag
(set by software)
LVIMD flag
(set by software)
H
<1>
Note 1
<3>
Notes 1. The LVIMK flag is set to “1” by RESET input.
2. The LVIF flag may be set (1).
3. LVIRF is bit 0 of the reset control flag register (RESF). For details of RESF, see CHAPTER 16
RESET FUNCTION.
Remark <1> to <6> in Figure 19-4 above correspond to <1> to <6> in the description of “when starting operation”
in 19.4 (1) When used as reset.