Digilent 410-044-10P-KIT Manual de usuario descargar pdf (Pagina 35)

Spartan-3 Starter Kit Board User Guide www.xilinx.com 35

UG130 (v1.1) May 13, 2005 1-800-255-7778

Chapter 8

Clock Sources

The Spartan-3 Starter Kit board has a dedicated 50 MHz Epson SG-8002JF series clock

oscillator source and an optional socket for another clock oscillator source. Figure A-5

provides a detailed schematic for the clock sources.

The 50 MHz clock oscillator is mounted on the bottom side of the board, indicated as

in Figure A-5. Use the 50 MHz clock frequency as is or derive other frequencies using the

FPGAs Digital Clock Managers (DCMs).

• Using Digital Clock Managers (DCMs) in Spartan-3 FPGAs

http://www.xilinx.com/bvdocs/appnotes/xapp462.pdf

The oscillator socket, indicated as in Figure 1-2, accepts oscillators in an 8-pin DIP

footprint.

Table 8-1:

Clock Oscillator Sources

Oscillator Source FPGA Pin

50 MHz (IC4) T9

Socket (IC8) D9

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 63 64

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Digilent 410-044-10P-KIT Manual de usuario Pagina 35