N27 Hardware User Guide
Chapter 4 Application Interfaces
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Figure 4-14 I2S connection
I2S_TX
I2S_RX
I2S_WS
I2S_SCLK
N27 module
CODEC
I2S_MCLK
I2S_MCLK
I2S_DIN
I2S_DOUT
I2S_LRCLK
I2S_BCLK
Schematic guidelines:
Note the match of signals.
Leave I2S_MCLK floating in your application if it is not required for the CODEC chipset selected.
The I2S function complies with Phillips I2S Bus Specifications revised June 5, 1996. Figure 4-15 shows
the I2S timing.
Figure 4-15 I2S timing
T
t(LC)
t(HC)
t(htr)
t(dtr)
t(sr)
t(hr)
SCK
Tx
WS
Rx
WS
2.0V
0.8V
Table 4-2 Timing parameters of I2S interface
Timing Parameter
Minimum Value
Typical Value Maximum Value
Unit
T
Clock cycle
81.380
/
/
ns
t(HC) Clock high time
0.45*T
/
0.55*T
ns
t(LC) Clock low time
0.45*T
/
0.55*T
ns
