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Altera Cyclone II FPGA Starter User Manual Page 47

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Altera Corporation 6–5
October 2006 Cyclone II FPGA Starter Development Kit User Guide
Advanced Examples
Table 6–2 illustrates the usage of the PS/2 Keyboard.
SD Card Music
Player
Many commercial media/audio players use a large external storage
device, such as a Secure Digital (SD) card or Compact Flash (CF) card, to
store music or video files. Such players may also include high-quality
digital-to-analog converter (DAC) devices to produce good audio quality.
The development board provides the hardware and software for SD card
access and for the professional audio performance, which enable users to
design advanced multimedia products on the development board.
This demonstration shows how to implement an SD Card Music Player
on the development board. The sample music-player design stores the
music files in an SD card and enables the board to play the music files via
its CD-quality audio DAC circuits. The design uses the Nios II processor
to read the music data stored in the SD Card and uses the Wolfson
WM8731 audio CODEC to play the music.
Table 6–2. PS/2 Keyboard
Signal Name Description
Q
-#4
A
-5
W
-#5
S
-6
E
-#6
D
-7
F
1
T
#1
G
2
Y
#2
H
3
J
4
I
#4
K
5
O
#5
L
6
P
#6
:
7
“
+1
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