4 messages, 3 authors, 2004-06-22 · open the first message on its own page
From: Iñigo Lopez Barranco <hidden>
Date: 2004-06-21 10:03:23
Hi. I've bought a 3.3V PCI ethernet card (US Robotics 7900) and tried to use it with the Lite5200 kit, but when I power it, it doesn't even turn on, with both power LEDs (3.3V and 5V) off. What may be the problem and where should I look for it? Thanks. Iñigo ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
From: Gerhard Jaeger <hidden>
Date: 2004-06-21 10:26:24
Hi, On Monday 21 June 2004 12:03, Iñigo Lopez Barranco wrote:
Hi. I've bought a 3.3V PCI ethernet card (US Robotics 7900) and tried to use it with the Lite5200 kit, but when I power it, it doesn't even turn on, with both power LEDs (3.3V and 5V) off.
I don't understand, what do you mean "with both power LEDs off", the LEDs on the Lite5200? If yes, then I guess you have a problem!
What may be the problem and where should I look for it? Thanks.
One problem is, that not every 3.3V PCI card will work on the 5200Lite, as of some problems of the MPC5200 with PCI timings (see the errata-sheet): http://e-www.motorola.com/files/microcontrollers/doc/errata/MPC5200E.pdf And of course it should be inserted correctly - sorry if this is too obvious! One card, that is known to work in this slot is the Intel eepro100 NIC. Ciao, Gerhard ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
From: Mark Jonas <hidden>
Date: 2004-06-21 19:19:42
Iñigo, I experienced this behavior with an USB card before. With that card the reason was a short on the USB card between 3.3V and 5V supply pins. In a normal PC this seems to be no problem (maybe because a PC's PCI ports are 5V only). The Lite5200 survived. To be sure if this is the problem I recommend testing the card for the short. Mark
Hi. I've bought a 3.3V PCI ethernet card (US Robotics 7900) and tried to use it with the Lite5200 kit, but when I power it, it doesn't even turn on, with both power LEDs (3.3V and 5V) off. What may be the problem and where should I look for it? Thanks. Iñigo
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
From: Gerhard Jaeger <hidden>
Date: 2004-06-22 06:08:40
Hi, On Monday 21 June 2004 21:19, Mark Jonas wrote:
Iñigo, I experienced this behavior with an USB card before. With that card the reason was a short on the USB card between 3.3V and 5V supply pins. In a normal PC this seems to be no problem (maybe because a PC's PCI ports are 5V only).
there seem to be more cards like these, they're in fact badly designed - they shorten the VI/O pins and 5V on the card, which could cause some trouble on the Lite5200, as the VI/O stuff is directly connected to the RAM chips and their I/O does not like the 5V... We sorted out some cheap networking adaptors...
The Lite5200 survived.
"What a lucky man he was" :-)
To be sure if this is the problem I recommend testing the card for the short.
That's a great idea, check esp. shortage between the VI/O and 5V lines on the card... Gerhard ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/