UPD78F0838 Renesas Electronics Corporation., UPD78F0838 Datasheet - Page 800

• Manufacturer Part Number: UPD78F0838
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

798
If supply voltage fluctuation is 50 ms or less in vicinity of LVI detection voltage
Note
No
A flowchart is shown on the next page.
(TMHE1 = 0
Setting 8-bit timer H1
50 ms have passed?
(to measure 50 ms)
Restarting timer H1
voltage or higher
Figure 24-9. Example of Software Processing After Reset Release (1/2)
processing <1>
processing <2>
(TMIFH1 = 1?)
Clearing WDT
Initialization
Initialization
(LVIF = 0?)
Detection
Reset
No
Yes
TMHE1 = 1)
LVI reset
CHAPTER 24 LOW-VOLTAGE DETECTOR
Preliminary User’s Manual U19748EJ1V0UD
Yes
;
; f
; Setting of division ratio of system clock,
; The timer counter is cleared and the timer is started.
Check the reset source
Initialize the port.
Source: f
Timer starts (TMHE1 = 1).
such as setting of timer or A/D converter
PRS
= Internal high-speed oscillation clock (8.4 MHz (MAX.)) (default)
Where comparison value = 102:
PRS
(8.4 MHz (MAX.))/2
Note
12
,
50 ms