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SIM800L Arkusz danych(PDF) 45 Page - SIMCom

Numer części SIM800L
Szczegółowy opis  Hardware Design_V2.02
PDF  73 Pages
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Producent  SIMCOM [SIMCom]
Strona internetowa  https://www.simcom.com
Logo SIMCOM - SIMCom

SIM800L Arkusz danych(HTML) 45 Page - SIMCom

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Figure 41: 50 keys reference circuit
Note：Do not change the 20KΩ resistor in the diagram.
Customer could cascade a less than 1K resistor to enhance the ESD performance, the connection diagram is as
following:
Figure 42: Keypad reference circuit
Whether using a 5*5 keys or 5*5*2 keys, the module can also detect the two buttons pressed. But when using a
5*5*2 button, the same row, column two buttons at the same time can not be detected when pressed, as shown
below:
Figure 43: Keypad detected
SIM800H&SIM800L_Hardware Design_V2.02
45
2015-07-27



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