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Karen, Thank you! The connector, the communications needed to
make it work, and a power definition, are the UPAMD/P1823 project. The communications part of the UPAMD project should be a
rather limited affair. The extent, at least as originally envisioned in
the PAR, was point to point link between the adapter and the device for the
purpose of controlling the expectations of the device and control of the
adapter. The source and sink of the power. I would expect the communication speed to be in the 10KHz - <1MHz.
To avoid radio interference it will most likely be lower than higher. I
expect that something like the CAN bus can be used and it is available in the very
inexpensive microcontrollers, from multiple sources, which could also control
the power supply. Other options, or modulation methods, may be found. Connection
distances are most likely sub 3 meters. Longest message is probably the
ID message <1Kbits + checksum/ECC. Keeping the future in mind may include understanding a
compatible upgrade path for the next generation of devices. Broadband communications is handled well by IEEE 802
derivations. Respectfully, Bob Davis |