The RS232 serial port lines are usually connected to a DB9 connector with the following
layout:
Figure 15: example RS232 serial port lines
General Purpose I/O
The ME910G1 module includes a set of Configurable Digital Input / Output pins (CMOS
1.8V). The Input pads can only be read; they report the digital value (high or low) present
on the pad at the time of reading. The Output pads can only be written or queried and set
the value of the pad output.
An alternate function pad is controlled internally by the ME910G1 firmware and acts
depending on the function implemented.
The following table shows the available GPIO on the ME910G1:
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