9/1/2023 0 Comments Arduino io expander![]() ![]() ![]() It’s easy to forget that they are actually 8-bit wide ports. If you have spent some time programming the Arduino, you may be very familiar with reading and writing to ports in a bit by bit manner, e.g. And the chip has three selectable address lines so we can set it up with 2 3 = 8 possible addresses, or put additional MPC23017 chips on the same I 2C line. Its wire library takes care of the communication. The MPC23017 contains two 8-bit bi-directional ports which can be connected to the Arduino with an I 2C interface. ![]() For example, a 3Gbit/s port might have a hub or expander installed and now be able to accommodate 6 devices, but at a maximum of 3Gbit/s throughput bandwidth divided by the said 6 devices, or by however many are plugged in and being used. A port expander is like the extension cord (in the non-computer world) that allows more than one device to connect to a single port on a computer. ![]()
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