CHAPTER 16 LOW-VOLTAGE DETECTOR
Preliminary User’s Manual U16898EJ1V0UD
255
Figure 16-6. Example of Software Processing After Release of Reset (1/2)
•
If supply voltage fluctuation is 50 ms or less in vicinity of LVI detection voltage
Yes
LVI
No
;
The reset source (power-on clear, WDT, or LVI)
can be identified by the RESF register.
;
TMIFH1 = 1: Interrupt request is generated.
;
Initialization of ports
;
8-bit timer H1 can operate with the low-speed Ring-OSC clock.
Source: f
RL
(480 kHz (MAX.))/2
7
×
compare value 200 = 53 ms
(f
RL
: low-speed Ring-OSC clock oscillation frequency)
Note 1
Reset
Check
reset source
Note 2
50 ms has passed?
(TMIFH1 = 1?)
Initialization
processing
Start timer
(set to 50 ms)
Notes 1. If reset is generated again during this period, initialization processing is not started.
2. A flowchart is shown on the next page.
www.DataSheet4U.com
www.DataSheet4U.com