Altera Cyclone II DSP Development Board Manual do Utilizador descarregar pdf (Página 27)

Altera Corporation Reference Manual 2–19

August 2006 Cyclone II DSP Development Board

Cyclone II DSP Development Board Components

Table 2–12 lists the J35 jumper settings used to select the D/A clock.

Figure 2–8 shows the J35 and J34 pin-outs listed in Table 2–12. Pins 1 and

2 show an example jumper setting used to select the OSC clock.

Figure 2–8. J35 & J34 Pin Settings

Table 2–12. TI DAC904E D/A Converter (U25 & U30) Clock Source Settings

Clock Source Board Reference Schematic Signal Name

D/A Converter Clock

Select (J35 & J34)

Setting

OSC clock OSC

CLK_OSC_DACA (Channel A)

CLK_OSC_DACB (Channel B)

Pins 1 and 2

FPGA clock PLL

FPGA_TO_DAC_CLK

Pins 3 and 4

SMA clock (J26) SMA

SMA_TO_DAC_CLK

Pins 5 and 6

J35 or J34

Pin 1

Pin 2

OSC

PLL

SMA

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 111 112

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