Monitor The Power Supply; Turn On/Turn Off/Reset; Turn On Module With Pwrkey - Quectel EC200U Series Hardware Design

DC_IN
470 μF
100 nF

3.6.4. Monitor the Power Supply

You can use AT+CBC to monitor the VBAT_BB voltage value. For more details, see document [2].

3.7. Turn on/Turn off/Reset

3.7.1. Turn on Module with PWRKEY

Table 10: Pin Description of PWRKEY
Pin Name Pin No.
PWRKEY 21
When the module is in power-off mode, it can be turned on to normal mode by driving PWRKEY to a low
level for at least 2 s. It is recommended to use an open drain/collector driver to control the PWRKEY. A
simple reference circuit is illustrated in the following figure.
EC200U_Series_Hardware_Design
MIC29302WU
2
IN
51K
4.7K
VBAT_EN
47K
Figure 9: Reference Circuit of Power Supply
I/O Description
DI Turn on/off the module
LTE Standard Module Series
4
OUT
100K
1 %
470R
47K
1 %
Comment
VBAT power domain
VBAT
470 μF
100 nF
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