[hpsdr] [OZY] Schematic Update May 18, 2006 - REVXA.5

[Philip Covington]

Chris,

The JTAG chain on the Atlas bus does connect to the FPGA... therefore
we can program the JTAG chain on the Atlas bus over USB.  The Cyclone
II FPGA on OZY is configured by the FX2 over USB, Active or Passive
Serial, it's JTAG pins, and/or the configuration device.  The
configuration device can be programmed by an external programmer or
the FX2 also.  I don't see where the problem is?

73 de Phil N8VB




On 5/19/06, Christopher T. Day <CTDay at lbl.gov> wrote:
> Phil,
>
> If I read the schematic correctly, there is no access to the JTAG chain
> other than through the JTAG connector on Ozy. Since the JTAG pins are
> dedicated on the Cyclone II, there's no way to get access to them from
> inside the Cyclone's configuration file. What's bothering me is how the
> firmware/configuration files of CPLD/FPLA's on other boards get updated.
> If there were some way to access the JTAG lines from the FX2, everything
> could be programmed through the USB port via JTAG, particularly CPLDs =>
> no additional hardware needed for users to update their radios. Without
> the connection, some form of JTAG adapter is required along with mucking
> about inside the box. I get the feeling you've exhausted all the
> available pins on the big IC's, but I thought I'd point out this
> consequence of the design.
>
>
>         Chris - AE6VK
>
>
> -----Original Message-----
> From: Philip Covington [mailto:p.covington at gmail.com]
> Sent: Thursday, May 18, 2006 12:09 PM
> To: HPSDR List
> Subject: [hpsdr] [OZY] Schematic Update May 18, 2006 - REVXA.5
>
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi group,
>
> Today's update to the OZY schematic (REVXA.5) has been posted to:
>
> <http://www.philcovington.com/HPSDR/OZY/REVXA.5/>  and also HPSDR SVN.
>
> Top and Bottom PCB Assembly prints posted in PDF format also.
>
> Changes:
>
> 1. Changed LVDS parts DS92LV010 to SN65LVDM050D.  The DS92LV010A would
> allow us to  send a ~50 - 100 MHz clock off of the board.  For two
> clock inputs and two clock outputs we needed 4 parts.  The single
> SN65LVDM050D replaces the 4 DS92LLV010 parts and allows > 200 MHz
> clock rates.
>
> 2. Component position changes.
>
> 3. Silkscreen adjusted and now shown on Top and Bottom Assembly print.
>
> 73 de Phil N8VB
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