CS4349 Datasheet, PDF (20/40 Pages) Cirrus Logic – 192 kHz DAC w/ Volume Control and 1 Vrms @ 3.3 V

4.3.1
CS4349
Time-Division Multiplex (TDM) Mode
Four TDM interface modes are available that allow the CS4349 to input stereo PCM data in one of 4 time
“slots”. Figure 14 shows the serial port connections necessary to input 8-channel TDM data into four
CS4349 devices and the corresponding DIF[2:0] pin or register-bit settings required for each CS4349.
Figure 15 shows the TDM data format for each of the four CS4349 devices shown in Figure 14.
.
CS4349₁
DIF[2:0] = 100
CS4349₂
DIF[2:0] = 101
CS4349₃
DIF[2:0] = 110
CS4349₄
DIF[2:0] = 111
LRCK
SCLK
SDIN
ILRCK
ISCLK
SDIN
LRCK
SCLK
SDIN
LRCK
SCLK
SDIN
LRCK SCLK TDM_OUT
TDM Source
Figure 14. TDM Mode Connection Diagram
LRCK
SCLK
SDIN1
256 clks
MSB
Slot 1, ch A
32 clks
MSB
Slot 1, ch B
32 clks
MSB
Slot 2, ch A
32 clks
MSB
Slot 2, ch B
32 clks
MSB
Slot 3, ch A
32 clks
MSB
Slot 3, ch B
32 clks
MSB
Slot 4, ch A
32 clks
MSB
Slot 4, ch B
32 clks
Data
MSB
LSB
zero
Figure 15. TDM Mode Timing
20
DS782F1