UPD78F0386GK-8EU-A Renesas Electronics America, UPD78F0386GK-8EU-A Datasheet - Page 539

• Manufacturer Part Number: UPD78F0386GK-8EU-A
• Description: MCU 96KB FLASH 5KB RAM
• Manufacturer: Renesas Electronics America
• Series: 78K0/Lx2r

Specifications of UPD78F0386GK-8EU-A

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: LCD, LVD, POR, PWM, WDT
• Number Of I /o: 26
• Program Memory Size: 96KB (96K x 8)
• Program Memory Type: FLASH
• Ram Size: 5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

If supply voltage fluctuation is 50 ms or less in vicinity of LVI detection voltage
Note A flowchart is shown on the next page.
No
(TMHE1 = 0
Setting 8-bit timer H1
Figure 24-9. Example of Software Processing After Reset Release (1/2)
(to measure 50 ms)
50 ms has passed?
Restarting timer H1
voltage or higher
processing <1>
processing <2>
(TMIFH1 = 1?)
Clearing WDT
Initialization
Initialization
(LVIF = 0?)
Setting LVI
Detection
LVIF = 0
Reset
No
Yes
TMHE1 = 1)
LVI reset
CHAPTER 24 LOW-VOLTAGE DETECTOR
Yes
User’s Manual U17504EJ2V0UD
;
; Setting of detection level by LVIS
; 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.
The low-voltage detector operates (LVION = 1).
Source: f
Timer starts (TMHE1 = 1).
such as setting of timer or A/D converter
The low-voltage detection flag is cleared.
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
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