BAT32G1x9 user manual | Chapter 31 Voltage detection circuit
1109 / 1149
Rev.1.02
(2) Delay from generating the LVD reset source to generating or removing the LVD reset
From meeting the supply voltage (VDD)
＜
LVDDetection voltage (VLVD) to produceLVDThere is a delay until
the reset is made. A
gain, fromLVDDetection voltage (VLVD) ≤ supply voltage (VDD) to liftLVDA delay also occurs
until the reset is made (see figure 30-10).
Fig. 30-10 Delay from generating the LVD reset source to generating or removing the
LVD reset
(1): Detection delay (300us(MAX.).) )
(3) About the situation where the LVD is plugged in when the power is turned on as OFF
When lvd is set to OFF, an external reset of the RESET B pin must be used.
When performing an external reset, a low of 10us must be input to the RESETB pin. If an external reset
occurs while the supply voltage rises, the power must be switched on after inputting a low level to the RESETB
pin and keeping it at least 10us low over the operating voltage range shown in the AC characteristics of the
data sheet, and then entering the high level.
(4) About the case when the operating voltage drops when LVD is set to OFF and set to LVD interrupt
mode
In the case of setting LVD to OFF and to LVD interrupt mode, if the operating voltage drops, it must be reset
by transferring the deep sleep mode or external reset before the operating voltage falls below the operating voltage
range indicated by the AC characteristics of the data sheet. When restarting operation, you must confirm that
the supply voltage has returned to the operating voltage range.
Supply voltage
(IN
DD
).
V
LVD
Time
①
LVD reset signal
①
