DS691A3

19

CS4350

4.3.1

Time-Division Multiplex (TDM) Mode

Four TDM interface modes are available that allow the CS4350 to input stereo PCM data in one of 4 time

“slots”. Figure 11 shows the serial port connections necessary to input 8-channel TDM data into four

CS4350 devices, and the corresponding DIF[2:0] pin or register-bit settings required for each CS4350.

Figure 12 shows the TDM data format for each of the four CS4350 devices shown in Figure 11.

.

LRCK

SCLK

SDIN

ILRCK

ISCLK

SDIN

LRCK

SCLK

SDIN

LRCK

SCLK TDM_OUT

TDM Source

LRCK

SCLK

SDIN

DIF[2:0] = 100

DIF[2:0] = 101

DIF[2:0] = 110

DIF[2:0] = 111

Figure 11. TDM Mode Connection Diagram

Slot 2, ch B

LRCK

SCLK

MSB

MSB

MSB

MSB

MSB

SDIN1

Slot 4, ch A

Slot 4, ch B

Slot 2, ch A

Slot 1, ch A

256 clks

32 clks

32 clks

32 clks

32 clks

32 clks

MSB

Slot 3, ch A

32 clks

MSB

Slot 1, ch B

32 clks

MSB

Slot 3, ch B

32 clks

LSB

MSB

zero

Data

Figure 12. TDM Mode Timing