Overview; Power Supply Voltage Detection Overview - Panasonic MN101L Series User Manual

Chapter 6
Power Supply Voltage Detection

6.1 Overview

6.1.1

Power Supply Voltage Detection Overview

This LSI has the power supply voltage detector (PSVD) to detect power supply voltage and generate interrupt.
PSVD compares the power supply voltage (V
(LVIIRQ) when the level of V
the LVICTR0 register.
PSVD operates regardless of the value of the CPU control register.
Power supply
voltage (V
DD30
V
LVI
LVION
bit
LVIOUT
bit
Interrupt request
- Power supply voltage detection function is OFF (LVION=0)
(1) Though power supply voltage (at falling) falls below the detection voltage (V
(2) Though power supply voltage (at rising) exceeds the detection voltage (V
- Power supply voltage detection function is ON (LVION=1)
(3) As power supply voltage (at falling) falls below the detection detection voltage (V
(4) As power supply voltage (at rising) exceeds the detection voltage (V
VI - 2 Overview
crosses that of V
DD30
)
(1) (2)
Figure:6.1.1 Power Supply Detection Waveform
) and the detection voltage (V
DD30
. V can be changed between from 1.1 V to 2.9 V with
LVI LVI
(3)
LVION set
), the interrupt request is not generated and the LVIOUT bit is not cleared.
LVI
), the interrupt request is not generated and the LVIOUT bit is not cleared.
LVI
), the interrupt request is generated and the LVIOUT bit is cleared.
LVI
), the interrupt request is generated and the LVIOUT bit is set.
LVI
), and generates the interrupt
LVI
(4)