Xilinx XAPP169 MP3 NG: A Next Generation Consumer Platform, Figure 6: Control Port Timing (Courtesy Cirrus Logic), Figure 7: Serial Port Timing (Courtesy Cirrus Logic)

MP3 NG: A Next Generation Consumer Platform
XAPP169 (v1.0) November 24, 1999 www.xilinx.com 7
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The serial port can be configured for several operating modes. The mode of operation ch osen
for this application is referred to in the CS4343 documentation as "Serial Audio Format 2".
Figure 7 gives an overview of serial port timing when in this mode.
t
buf thdst
t
hdst
t
low
t
r
t
f
t
hdd
thigh
t
sud
t
sust
t
susp
Stop Start
Start
Stop
Repeated
SDA
SCL
t
irs
RST
Figure 6: Control Port Timing
(Courtesy Cirrus Logic)
Figure 7: Serial Port Timing
(Courtesy Cirrus Logic)
LRCK
SCLK
Left Channel Right Channel
SDATA 6543210987
15 14 13 12 11 10 6543210987 15 14 13 12 11 10