Instruction Manual

XUP Virtex-II Pro Development System www.xilinx.com 39
UG069 (v1.0) March 8, 2005
Using the AC97 Audio CODEC and Power Amp
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Using the AC97 Audio CODEC and Power Amp
The audio system on the XUP Virtex-II Pro Development System consists of a National
Semiconductor® LM4550 AC97 audio CODEC paired with a stereo power amplifier
(TPA6111A) made by Texas Instruments. The AC97-compliant audio CODEC is widely
used as the audio system in PCs and MACs, ensuring availability of drivers for these
devices.
The LM4550 audio CODEC supports the following features:
Greater than 90 dB dynamic range
18-bit Σ∆ converter architecture
18-bit full-duplex, stereo CODEC
Four analog line-level stereo inputs (one is used on the XUP Virtex-II Pro
Development System)
Two analog line-level stereo outputs
Mono MIC input with built-in 20 dB preamp, selectable for two sources (one used)
VREF_OUT, reference voltage provides bias current for Electret microphones
Power management support
Full-duplex variable sample rates from 4 kHz to 48 kHz in 1 Hz increments
VGA_OUT_GREEN[5] O 7 H11 LVTTL 8 mA SLOW
VGA_OUT_GREEN[6] O 8 G11 LVTTL 8 mA SLOW
VGA_OUT_GREEN[7] O 9 E11 LVTTL 8 mA SLOW
VGA_OUT_BLUE[0] O 16 D15 LVTTL 8 mA SLOW
VGA_OUT_BLUE[1] O 17 E15 LVTTL 8 mA SLOW
VGA_OUT_BLUE[2] O 18 H15 LVTTL 8 mA SLOW
VGA_OUT_BLUE[3] O 19 J15 LVTTL 8 mA SLOW
VGA_OUT_BLUE[4] O 20 C13 LVTTL 8 mA SLOW
VGA_OUT_BLUE[5] O 21 D13 LVTTL 8 mA SLOW
VGA_OUT_BLUE[6] O 22 D14 LVTTL 8 mA SLOW
VGA_OUT_BLUE[7] O 23 E14 LVTTL 8 mA SLOW
VGA_OUT_PIXEL_CLOCK O 26 H12 LVTTL 12 mA SLOW
VGA_COMP_SYNCH O 11 G12 LVTTL 12 mA SLOW
VGA_OUT_BLANK_Z O 10 A8 LVTTL 12 mA SLOW
VGA_HSYNCH O J13.14 B8 LVTTL 12 mA SLOW
VGA_VSYNCH O J13.13 D11 LVTTL 12 mA SLOW
Table 2-7: XSGA Output Connections (Continued)
Signal Direction
Video
DAC or Output
Connector Pin
FPGA
Pin
I/O Type Drive Slew