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| 17:36.16 | lennert | not sure if i've asked this before.. anyone got more info on the xilinx usb-jtag cable? |
| 17:50.06 | vmaster | not sure if it was here, but i've heard it's a 32 or 64 macrocell cpld plus a usb controller |
| 17:52.42 | vmaster | ah, actually it's a coolrunner2 128 macrocell + cypress high-speed usb |
| 17:54.51 | lennert | the digilent virtex2pro board has the cable integrated |
| 17:55.07 | lennert | i.e. there is a usb connection on the board and the usb-jtag logic is on the board itself |
| 17:55.12 | lennert | i see.. |
| 17:55.19 | vmaster | heh, undocumented, i guess? |
| 17:55.25 | lennert | a cy7c68013 |
| 17:55.47 | vmaster | that's a fx2 |
| 17:55.57 | lennert | vmaster: yup, the relevant parts have been left out of the pdf drawings mentioning that it's not public info |
| 17:56.23 | lennert | under the board.. an xc2c256 |
| 17:56.35 | vmaster | comp.arch.fpga, october 18th, |
| 17:56.38 | vmaster | Re: Xilinx USB cable |
| 17:56.38 | vmaster | From: |
| 17:56.38 | vmaster | Antti Lukats <antti@openchip.org> |
| 17:56.38 | vmaster | Date: |
| 17:56.38 | vmaster | Tuesday 18 October 2005 20:04:05 |
| 17:56.44 | vmaster | Groups: |
| 17:56.44 | vmaster | comp.arch.fpga |
| 17:56.45 | vmaster | References: 1 2 |
| 17:56.48 | lennert | and an xcf32p |
| 17:57.06 | lennert | (the flash programming info for the xc2c256, i presume) |
| 17:57.17 | lennert | vmaster: what's that? programming info? |
| 17:57.24 | vmaster | antti lukas about the xilinx cables |
| 17:57.33 | lennert | okay |
| 17:57.40 | vmaster | mentioning that the firmware for the fx2 is downloaded during device enumeration |
| 17:57.57 | lennert | i kind of hate this board.. the systemace is undocumented and so is the usb-jtag |
| 17:58.07 | lennert | hmmm, what's the xcf32p for, then? |
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| 17:59.14 | vmaster | how large is this? antti talks about a vid/pid eeprom |
| 18:00.17 | lennert | 32 megabit, i think? |
| 18:00.20 | lennert | let me find that. |
| 18:00.51 | vmaster | yeah, found a xilinx product matrix |
| 18:00.55 | vmaster | 32mbit |
| 18:01.13 | lennert | yup |
| 18:01.20 | lennert | ds123.pdf |
| 18:01.43 | lennert | the xupv2p board reference drawings have everything _except_ the usb-jtag stuff |
| 18:02.00 | lennert | so if it's not on there it's for the xc2c256 |
| 18:03.00 | vmaster | coolrunner doesn't need prom |
| 18:03.40 | lennert | of course.. |
| 18:03.41 | vmaster | the fx2 has 8kb ram - 32mbit seems a little bit too much |
| 18:03.42 | lennert | d'oh |
| 18:03.46 | lennert | :) |
| 18:03.57 | lennert | indeed, and the xcf32p connects to the v2pro |
| 18:04.13 | lennert | (but of course, the jtag chain is not brought out so it's no use for programming it either) |
| 18:09.10 | lennert | the parallel one is simple: http://toolbox.xilinx.com/docsan/2_1i/data/common/hug/fig13.htm |
| 18:09.41 | vmaster | i guess that's parallel cable 3 |
| 18:10.09 | lennert | yeah |
| 18:10.10 | vmaster | cable iv is more like the usb cable |
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