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SIM800L 데이터시트(PDF) 22 Page - SIMCom

부품명 SIM800L
상세설명  Hardware Design_V2.02
PDF  73 Pages
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제조업체  SIMCOM [SIMCom]
홈페이지  https://www.simcom.com
Logo SIMCOM - SIMCom

SIM800L 데이터시트(HTML) 22 Page - SIMCom

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Figure 9: The minimal VBAT voltage requirement at VBAT drop
Note: Hardware power down voltage is 3.0V.
4.1.2.
Monitoring Power Supply
AT command “AT+CBC” can be used to monitor the VBAT voltage. For detail, please refer to document [1].
4.2. Power on/off Scenarios
4.2.1.
Power on SIM800H&SIM800L
Customer can power on SIM800H&SIM800L by pulling down the PWRKEY pin for at least 1 second and
release. This pin is already pulled up to VBAT in the module internal, so external pull up is not necessary.
Reference circuit is shown as below.
SIM800H&SIM800L_Hardware Design_V2.02
22
2015-07-27
4.7K
47K
Turn on/off
impulse
PWRKEY
VBAT
100K
Power
on/down logic
1K
Module
Figure 10: Powered on/off module using transistor
PWRKEY
VBAT
100K
Power
on/down logic
1K
Module
Figure 11: Powered on/off module using button
The power on timing is illustrated as in the following figure.



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