CS4349 Datasheet, PDF (19/40 Pages) Cirrus Logic – 192 kHz DAC w/ Volume Control and 1 Vrms @ 3.3 V

CS4349
4.3 Digital Interface Format
The device will accept audio samples in 1 of 8 digital interface formats, as shown in Table 2 on page 24 for
Stand-Alone Mode and Table 3 on page 29 for Control Port Mode.
The desired serial audio interface format is selected via the DIF[2:0] bits in Control Port Mode (see
Section 8.2.1), or the DIF[2:0] pins in Stand-Alone Mode (see Section 5.1). For illustrations of the required
relationship between LRCK, SCLK and SDIN, see Figures 11-13. For all formats, SDIN is valid on the rising
edge of SCLK.
For more information about serial audio formats, refer to the Cirrus Logic Application Note AN282,
The 2-Channel Serial Audio Interface: A Tutorial, available at www.cirrus.com.
LRCK
SCLK
SDIN
Left Channel
Right Channel
MSB -1 -2 -3 -4 -5
+5 +4 +3 +2 +1 LSB
MSB -1 -2 -3 -4
+5 +4 +3 +2 +1 LSB
Figure 11. Left-Justified up to 24-Bit Data
LRCK
SCLK
SDIN
Left Channel
Right Channel
MSB -1 -2 -3 -4 -5
+5 +4 +3 +2 +1 LSB
MSB -1 -2 -3 -4
+5 +4 +3 +2 +1 LSB
Figure 12. I²S, up to 24-Bit Data
LRCK
SCLK
SDIN LSB
Left Channel
Right Channel
MSB -1 -2 -3 -4 -5
+7 +6 +5 +4 +3 +2 +1 LSB
MSB -1 -2 -3 -4 -5
Figure 13. Right-Justified Data
+7 +6 +5 +4 +3 +2 +1 LSB
DS782F1
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