PCM3168APAPR datasheet(23/66 Pages) TI

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VDD

SynchronousClocks

ZERO

Power-Down

NormalOperation

SynchronousClocks

SCKI,

BCKAD/DA,

LRCKAD/DA

RST

InternalReset

VOUT1

VOUT8

DOUT1/2/3

ADCDLY2

DACDLY1

DACDLY2

0.5

VCC

(VDD=3.3V,typ)

3846

SCKI

Fade-In

100ns(min)

ADCDLY1

AUDIO SERIAL PORT OPERATION

AUDIO DATA INTERFACE FORMATS AND TIMING

PCM3168A

PCM3168A-Q1

www.ti.com ......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008

Figure 34. External Reset Timing Requirements

The PCM3168A and PCM3168A-Q1 audio serial ports consist of 11 signals: BCKDA, BCKAD, LRCKDA,

LRCKAD, DIN1, DIN2, DIN3, DIN4, DOUT1, DOUT2, and DOUT3. The PCM3168A and PCM3168A-Q1 also

support audio interface mode, slave mode, and master mode. The BCKAD/DA is a bit clock input at the slave

mode and an output at the master mode. The LRCKAD/DA is a left/right word clock or frame synchronization

clock input at slave mode and output at master mode. The DIN1/2/3/4 are the audio data inputs for the DAC. The

DOUT1/2/3 are the audio data outputs from the ADC. BCKAD, LRCKAD and DOUT1/2/3 are used for the ADC,

and BCKDA, LRCKDA and DIN1/2/3/4 are used for the DAC.

The PCM3168A and PCM3168A-Q1 support eight audio data interface formats for the ADC and DAC separately

in both master and slave modes: 24-bit I2S, 24-bit left-justified, 24-bit right-justified, 16-bit right-justified, 24-bit

left-justified mode DSP, 24-bit I2S mode DSP, 24-bit left-justified mode TDM, and 24-bit I2S mode TDM format.

The PCM3168A and PCM3168A-Q1 also support two audio data interface formats for the DAC and slave mode:

24-bit left-justified mode high-speed TDM and 24-bit I2S mode high-speed TDM format. In the case of I2S,

left-justified, and right-justified data formats, 64 BCKs, 48 BCKs, and 32 BCKs per LRCK period are supported,

but 48 BCKs are limited in slave mode and 32 BCKs are limited in slave mode 16-bit right-justified only. In the

case of TDM data format in single rate, BCKAD/DA, LRCKAD/DA, DOUT1, and DIN1 are used. In the case of

TDM data format in dual rate, BCKAD/DA, LRCKAD/DA, DOUT1/2, and DIN1/2 are used. In the case of

high-speed TDM format in dual rate, BCKDA, LRCKDA, and DIN1 are used. In the case of high-speed TDM

format in quad rate, BCKDA, LRCKDA, and DIN1/2 are used. TDM format and high-speed TDM format are

supported only at SCKI = 512 fS, 256 fS, 128 fS, and fBCK ≤ fSCKI. The audio data formats are selected by

MC/SCL/FMT in hardware control mode and registers 65 and 81 in software control mode. All data must be in

binary twos complement, MSB first.

Figure 35 through Figure 41 show 10 audio interface data formats. Table 8 summarizes the applicable formats

and describes the relationships among them and the respective restrictions with mode control.

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PCM3168APAPR Datasheet(PDF) 23 Page - Texas Instruments

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