HW-SD1800A-DSP-SB-UNI-G Xilinx Inc, HW-SD1800A-DSP-SB-UNI-G Datasheet - Page 31

• Manufacturer Part Number: HW-SD1800A-DSP-SB-UNI-G
• Description: KIT DEVELOPMENT SPARTAN 3ADSP
• Manufacturer: Xilinx Inc
• Series: Spartan™-3A DSPr
• Type: DSPr

Specifications of HW-SD1800A-DSP-SB-UNI-G

• Contents: Development Platform, Power Supply and software
• Silicon Manufacturer: Xilinx
• Features: 10/100/1000 PHY, JTAG Programming And Configuration Port
• Silicon Family Name: Spartan-3A
• Silicon Core Number: 3SD1800A-FG676
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: Spartan 3A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 122-1574; HW-SD1800A-DSP-DB-UNI-G; HW-SD1800A-DSP-DB-UNI-G; HW-SD1800A-DSP-SB-UNI-G

Spartan-3A DSP Starter Platform User Guide
UG454 (v1.1) January 30, 2009
R
consequently, PI filters on the output of each of the PTH05050WAZ and PTH04000WAZ are
utilized to minimize these transients.
X-Ref Target - Figure 11
Based on measurements during prototyping, the PTH04000 circuit for 1.2V was tuned to
increase the output voltage slightly. The voltage measured at the FPGA was observed to be
about 20mV low. Therefore, the set resistor for the PTH04000 was modified based on the
calculations provided in the TI data sheet to raise the voltage by 20mV. Nominally, resistor
R42 should be 26.1K, but on this board it is 24.3K.
The DDR2 0.9V reference and termination voltages (FPGA_DDR2_VREF, FPGA_0.9V_TT)
and the 1.8V power rail for the DDR2 memory and the DP83865 Ethernet PHY core voltage
are provided by a switching power supply designed around the Texas Instruments
TPS51116 Synchronous Buck Controller. The +1.2V, +2.5V and +3.3V power rails are
monitored to provide an active-low reset condition (PO_RESET#) until these rails are
above their threshold settings. A pushbutton switch (SW4) may be used to manually create
the PO_RESET# condition. LED D6 is lit when PO_RESET# is driven active. LEDs D16, D17
and D18 are lit to show the presence of +1.2V, +2.5V and P3.3V, respectively.
Current measurements of the various power rails may be taken by removing the shunts on
jumpers JP10 (+3.3V), JP14 (+2.5V), JP6 (+1.8V), and JP5 (+1.2V), and placing an ammeter
across the pins. Note that these jumpers are 2x2 requiring two shunts each in order top
provide enough current-carrying capacity so the user should ensure that both shunts are in
place for normal operation.
The user may experiment with the Spartan-3A DSP low-power SUSPEND mode by
jumpering JP11 pins 2:3 (default 1:2). The AWAKE LED (D15) indicates the SUSPEND
mode status.
www.xilinx.com
Figure 11: Application of Power
UG454_11_050908
Board Power
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