Using the ac97 audio codec and power amp – Digilent 6003-410-000P-KIT User Manual
Page 39
XUP Virtex-II Pro Development System
39
UG069 (v1.0) March 8, 2005
Using the AC97 Audio CODEC and Power Amp
R
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