Known issues
35
Known issues
The following is a list of the know issues regarding the XtremeDSP Spartan-3A DSP Development Board.
•
The Soft Touch connector pin assignments do not comply with the Soft Touch standard from Agilent. No
Soft Touch probe can be used with the XtremeDSP Spartan-3A DSP Development Board.
•
The FMC connector used on the XtremeDSP Spartan-3A DSP Development Board does not
completely
comply with the latest FMC standard (as the standard is yet to be released). The following table lists the rules
and recommendations violated on the XtremeDSP Spartan-3A DSP Development Board.
Table 22 FMC standard rule and recommendation violations
Rule/Recommendation
Violation
Rule 27
No available front panel on the XtremeDSP Spartan-3A DSP Development
Board. The isolation between the chassis ground and digital ground is performed
with a ferrite.
Rule 28
Standoffs adjacent to FMC connector or not connected to the chassis ground or
digital ground.
Recommendation 7
LA17 and LA28 are not connected to clock-capable I/Os.
Recommendation 11
CLK0_M2C signals are not connected to dedicated clock pins.
•
The DDR2 interface performance is limited to a clock rate of 133 MHz on the XtremeDSP Spartan-3A DSP
Development Board.
