upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 787

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

24.4.2 To use for interrupt
<To start operation>
<1> Mask the interrupt of LVI.
<2> Select the voltage to be detected by using the LVIS0 bit.
<3> Set the LVION bit to 1 (to enable operation).
<4> Insert a wait cycle of 0.1 ms (TYP) (target value) or more by software.
<5> By using the LVIF bit, check if the supply voltage > detected voltage.
<6> Clear the interrupt request flag of LVI.
<7> Unmask the interrupt of LVI.
<To stop operation>
Clear the LVION bit to 0.
Internal reset signal
Supply voltage
(bit 0 of LVIM)
POC detected
request signal
INTLVI signal
LVI detected
LVI detected
(active low)
POC reset
LVION bit
LVIF bit
voltage
voltage
Figure 24-7: Operation Timing of Low-Voltage Detector (LVIMD = 0)
signal
(V
DD
)
Delay
User’s Manual U16702EE3V2UD00
Delay
Chapter 24 Low-Voltage Detector
Set (by instruction, refer
to <3> above.)
Generation of
interrupt
request
Delay
Delay
Generation of
interrupt
request
Delay
Delay
Clear
(by POC reset request signal)
Delay
Delay
Time
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