CS4349 데이터 시트보기 (PDF) - Cirrus Logic

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CS4349

192 kHz DAC w/ Volume Control and 1 Vrms @ 3.3 V

Cirrus Logic 

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

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