LTE Standard Module Series
QuecPython_EC200U&A-XX_C4-P01_EVB_Specification_and_User_Guide 26 / 32
anti-crack sound; When GPIO10 sends four rising edges, Av = 24V/V , the anti-crack function is turned on.
The one-line pulse is controlled in a cyclic way, if the GPIO10 sends five rising edges, it will enter the first
working state; When GPIO10 sends six rising edges, it will enter the second working state, and so on.
4.6. Matrix Keypad
On EC200U-XX/EC200A-XX C4-P01 EVB, matrix keypad pins are reserved, and you can solder or
connect them by yourself. The EVB has keyboard keys by default.
Figure 13: Solder Diagram of Matrix Keypad
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