The 002 sticker reflects the revision update for B0 200MHz. The schematics number matches the PCB (look under the sticker!) Best Regards, Pat ___________________________________ Patrick T. Kelley Technical Marketing Engineer Network Processor Operation - Network Communications Group Intel Corporation 77 Reed Road HD2-141 Hudson, Massachusetts 01749-2895 patrick.t.kelley.jr@intel.com http://www.intel.com -----Original Message----- From: Scott C. Karlin [mailto:scott@CS.Princeton.EDU] Sent: Thursday, November 09, 2000 3:09 PM To: ixp1200@CS.Princeton.EDU Subject: Schematics for Eval Boards We just received a new version of the IXP1200 development board with the B0 stepping of the IXP1200 chip. Included in the shipment is the version 1.1.109 of the development environment CD-ROM. I would like to verify that the schematics on this CD-ROM match the board we just received. The evb_p1.pdf page title block states "TOP DOCUMENT NUMBER K-DD-54-30296-0-1" dated 13-AUG-99. Our older board was marked in the copper layer "A13033-001 A01 L1". Our new boards have a sticker in the same place marked "A13033-002". Can anyone confirm that the 13-AUG-99 schematics match the board we just received? Thanks, Scott PS: Early versions of the CD-ROM have the schematics in both pdf and PostScript format. Any chance we can see the PostScript versions again? -------------------------------------------------------------------------- Scott C. Karlin Princeton University PhD Candidate Department of Computer Science Voice: (609) 258-5386 35 Olden Street Email: scott@cs.princeton.edu Princeton, NJ 08544-2087 WWW: http://www.cs.princeton.edu/~scott --------------------------------------------------------------------------
I do see that the new PCB number does match the old PCB number (A13033). However, I'm starting to suspect that there is at least a small discrepancy between the board and the schematics. I'm looking carefully at the board and the schematics to convince myself that the board will work when plugged into a Pentium motherboard. (The PCI_debug.txt file not withstanding.) The signals which caught my eye are the PCI signals PRSNT1# and PRSNT2# found on pins B9 and B11 of the PCI backplane. For expansion boards, the PCI spec (rev 2.2, section 4.4.1) states that at least one of the signals must be grounded to indicate that a board is plugged into an expansion slot. The schematics (page 2, zone D3) show that these signals are pulled up to Vdd (3.3V) via 5Kohm ("R502") resistors R222 and R223. Both a visual inspection of the board and a check with a meter shows that R222 and R223 are 20Kohm (marked "203") resistors. While this is not a big discrepancy, it tells me that the schematics may not match in more significant ways. -Scott Pat Kelley writes:
The 002 sticker reflects the revision update for B0 200MHz.
The schematics number matches the PCB (look under the sticker!)
Scott Karlin writes:
We just received a new version of the IXP1200 development board with the B0 stepping of the IXP1200 chip. Included in the shipment is the version 1.1.109 of the development environment CD-ROM.
I would like to verify that the schematics on this CD-ROM match the board we just received. The evb_p1.pdf page title block states "TOP DOCUMENT NUMBER K-DD-54-30296-0-1" dated 13-AUG-99.
Our older board was marked in the copper layer "A13033-001 A01 L1". Our new boards have a sticker in the same place marked "A13033-002".
Can anyone confirm that the 13-AUG-99 schematics match the board we just received?
participants (2)
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Kelley Jr, Patrick T -
Scott C. Karlin