CS5368 datasheet(23/42 Pages) CIRRUS

23 / 42 page

DS624F4

CS5368

4.5.2

TDM Format

In TDM Mode, all eight channels of audio data are serially clocked out during a single Frame Sync (FS)

cycle, as shown in Figure 12. The rising edge of FS signifies the start of a new TDM frame cycle. Each

channel slot occupies 32 SCLK cycles, with the data left justified and with MSB first. TDM output data

should be latched on the rising edge of SCLK within time specified under ‘Serial Audio Interface - TDM Tim-

ing” section on page 16. The TDM data output port resides on the SDOUT1 pin. The TDM output pin is

complimentary TDM data. All SDOUT pins will remain active during TDM Mode. Refer to Section 4.11 “Op-

timizing Performance in TDM Mode” on page 29 for critical system design information.

Figure 12. TDM Format

4.5.3

Configuring Serial Audio Interface Format

The serial audio interface format of the data is controlled by the configuration of the DIF1 and DIF0 pins in

Stand-Alone Mode or by the DIF[1] and DIF[0] bits in the Global Mode Control Register in Control Port

Mode, as shown in Table 2.

Table 2. DIF1 and DIF0 Pin Settings

4.6

Speed Modes

4.6.1

Sample Rate Ranges

CS5368 supports sampling rates from 2 kHz to 21 kHz, divided into three ranges: 2 kHz - 54 kHz, 54 kHz -

108 kHz, and 108 kHz - 216 kHz. These sampling speed modes are called Single-Speed Mode (SSM),

Double-Speed Mode (DSM), and Quad-Speed Mode (QSM), respectively.

4.6.2

Using M1 and M0 to Set Sampling Parameters

The Master/Slave operation and the sample rate range are controlled through the settings of the M1 and

M0 pins in Stand-Alone Mode, or by the M[1] and M[0] bits in the Global Mode Control Register in Control

Port Mode, as shown in Table 3.

Table 3. M1 and M0 Settings

DIF1

DIF0

Mode

Left-Justified

I²S

TDM

Reserved

Mode

Frequency Range

Single-Speed Master Mode (SSM)

2 kHz - 54 kHz

Double-Speed Master Mode (DSM)

54 kHz - 108 kHz

Quadruple-Speed Master Mode (QSM)

108 kHz - 216 kHz

Auto-Detected Speed Slave Mode

2 kHz - 216 kHz

C h a nnel 6

SC L K

MS B

LS B

MS B

LS B

MS B

LS B

MS B

LS B

MS B

LS B

MS B

TD M O U T

C h a nne l 1

C han nel 4

C h a nne l 2

C hann el 5

C h ann el 3

3 2 c lks

3 2 clk s

3 2 clks

C han nel 8

LS B

MS B

LS B

MS B

C h anne l 7

3 2 clks

MS B

LS B

MS B

Da t a

Z e r oes

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