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MP3 NG: A Next Generation Consumer Platform
XAPP169 (v1.0) November 24, 1999 www.xilinx.com 7
1-800-255-7778
R
The serial port can be configured for several operating modes. The mode of operation chosen
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
t
hdst
t
hdst
t
low
t
r
t
f
t
hdd
t
high
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