Microchip Technology has introduced the ENC28J60, a 28-pin 10Base-T Stand-Alone Ethernet controller with SPI interface. A free TCP/IP stack is also available for PIC microcontrollers.
-Bill Giovino Executive Editor
"Bill Giovino" schrieb im Newsbeitrag news: snipped-for-privacy@comcast.com...
To bad this is only a 10 base device, even if the actual data through-put is much lower then 10 kbit, for compatibility with other devices on the net a base 100 controler would be desireable.
/Roland
Why do you say that? I use networks with a mixture of 100bT and 10bT devices all the time. There is not problem with "compatibility". Unless you actually need the bandwidth, the supposed advantage of 100bT over 10bT is pure marketing bullshit.
I applaud Microchip for make a sound engineering decision rather than wasting power and silicon on a usless feature.
That's almost true, but not quite. As long as you have switches on your network, then there is no problem mixing 10bT and 100bT - packets going from a 100bT PC to a 10bT ENC28J60 will travel at 100 Mb to the switch, then 10 Mb to the ENC, and vice versa on return. However, if you have hubs rather than switches, a single 10bT device on the network will hold the entire (hubbed) network at 10bT. Of course, few networks still use hubs rather than switches, so it's not much of a problem, and I agree it would be a big waste to add 100bT support to the chip.
Right.
Unfortunately, as suits rule the purchasing departments, they will pick a 100bT product from competitor A over an otherwise superior 10bT product from competitor B.
It sucks...
Greetings, Olav
stack is
Did anyone else notice the power consumption? 250ma at 3.3 volts!! A CS8900A manages to work at around 50ma at 3.3 volts. What is Microchip doing with all that extra power? Even 100base-T controllers use less than 250ma.
Ouch. Good catch.
I suspect a misprint somewhere. If that is in anything smaller than a DIP package it would at least need heat sinks to avoid desoldering itself.
From what I understand, it's not a misprint.
Best regards, Spehro Pefhany
has the power requirement 140mA for the ENC28J60
The latest revision appears to be better in this regard.
Best regards, Spehro Pefhany
140 mA is still too much. LAN91C111 (a 100 MBps part) uses 100 mA typical, 140 mA max.
Anyone have an idea of the price tag for the ENC28J60?
-jm
typical,
terve Jukka,
some news mentioned 4.15USD but no quantity
Antti
Thanks.. not too bad, I think.
-jm
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