ENC28J60 "WOL" signal?

JED · Joined: 13 Jul 2006 Posts: 8

Does anyone know what the WOL (pin 5 on a DIP package) signal does on the ENC28J60? I have a olimex NIC based on the ENC28J60 and its documentation mentions a “WOL” signal on pin 5 of the ENC28J60. The data sheet for the ENC28J60 doesn’t mention WOL and it states that pin 5 is reserved and should not be connected but the CCS drivers assign WOL to an i/o pin. The chip seems to function with WOL(pin5) hooked up to the pin defined in the CCS driver but I don’t want to fry anything or waist i/o. Any help would be greatly appreciated.
Regards,
JED

dyeatman · Joined: 06 Sep 2003 Posts: 1934 Location: Norman, OK

WOL is the Wake On Lan signal for initiating a processor wakeup from an incoming LAN connection.

A quick Google search on "ENC28J60 WOL" found this link:
shop.tuxgraphics.org/snippets/enc28j60.pdf

Section 12.0 fully explains the WOL usage and implementation.

Got to the Microchip site here:
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1335&dDocName=en022889

for all the data and errata sheets on the controller.

BTW: I neglected to answer your last two questions:
1. If you connect this signal the PIC pin MUST be an input.
2. No, it does not have to be connected unless you want to use WOL.

asmallri · Joined: 12 Aug 2004 Posts: 1634 Location: Perth, Australia

The original schematics from MCHP connected up the WOL pin. This was dropped on the latest PICTail board.
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JED · Joined: 13 Jul 2006 Posts: 8

Thank you both for the quick response. Sadly it didn’t occur to me to google it. I haven’t had time to do any further research but it looks like it is an option I probably won’t use for the time being.