I'm currently looking for a power line communication transceiver module.

I saw the following terms on

formatting link
in one of their product description, is about the host interface:


I guess they might be very fundamental stuff, but can someone tell me what are they and how do they interface with the PC? How do i make them work?

Thx guys

Reply to
Loading thread data ...

Cross-posted to sci.electronics.basics which is a more appropriate place for this level of question. Followups to sci.electronics.basics

These are indeed very fundamental pieces, and defined in IEEE 802.3 (definition freely available on the net via a quick google search). They don't interface directly externally to a PC - MII is 'Media Independent Interface', so called because the physical layer is not a data pair, but logic signals.

PHYs and MACs interface to a processor (of some description) on the command port (MDC/MDIO usually, but there are others, especially SPI) and to the ethernet transport layer either through magnetics (for cables) or capacitive coupling for ethernet over backplane (been there, done that). MACs and PHYs connect to each other through MII/RMII/GPSI.

I'm not going to fully define their operation for you - get a datasheet and read it. A typical datasheet is at:

formatting link
(AM79c901A home networking PHY)

One clue is this - MAC (Media Access Controllers) and PHYs (Physical layer interfaces) are usually separate for ethernet. The way they communicate is what you are looking at above. MII is very common, but so is GPSI (General Purpose Serial Interface).

That's the data port. There's also (usually), as I mentioned, a command port running either MDC/MDIO or SPI.

MACs and PHYs each provide different functions.

Once you have looked through the datasheets and app notes, (which will give you an idea of the operation of the devices), come back and ask again. It's not unwillingness to answer the question, but we do appreciate questioners who do at least some legwork.

How do i make them

Connect them up appropriately :)

Seriously, it would take a long time (and pictures) to explain their operation - I suggest reading available data sheets and application notes to get the basic idea. Try AMD and Intel for starters.

Apart from that, if you don't apparently even know what DTE means, it would be difficult to explain it



Reply to

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.