Cmsemicon CMS32L051 - Page 658

V1.2.2
CMS32L051 User Manual |Chapter 23 Voltage Detection Circuit
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Figure 23-5 Generation timing of interrupt signals (option bytes LVIMDS1, LVIMDS0=0, 1)
low limit of working
voltage range
VPOR=1.51V(TYP.)
VPDR=1.50V(TYP.)
power supply
voltage(VDD)
internal reset signal
VLVD
Time
POR reset signal
LVD reset signal
LVILV flag
LVIMD flag
LVIF flag
H
H
clear
clear via
software
LVIIF flag
INTLVI
LVIMK logo
(mask interrupt)
(set by software)
Note2
Note2
Note1
Note 1 After the reset signal is generated, the LVIMK flag changes to 1.
2. When the operating voltage drops, it must be set to the reset state by transferring or externally resetting the
operating voltage below the operating voltage range shown in the AC characteristics of the data sheet. During
restart operation, it must be confirmed that the supply voltage returns to the operating voltage range.
Note V
POR
: The POR supply voltage rise detection voltage
V
PDR
: The POR supply voltage drop detection voltage