CS8406 datasheet(29/42 Pages) CIRRUS

29 / 42 page

DS580F5

CS8406

The channel status block pin (TCBL) may be an input or an output, determined by the state of the TCBLD

pin.

10.2

Serial Audio Port

The serial audio input port data format is selected as shown in Table 3, and may be set to master or slave

by the state of the APMS input pin. The OMCK clock ratio is selected as shown in Table 4. Table 5 describes

the equivalent Software Mode, bit settings for each of the available formats. Timing diagrams are shown in

Figure 7.

COPY/C

ORIG

Function

PRO=0, COPY=0, L=0 copyright

PRO=0, COPY=0, L=1 copyright, pre-recorded

PRO=0, COPY=1, L=0 non-copyright

PRO=1

Table 2. Hardware Mode COPY/C and ORIG Pin Functions

SFMT1 SFMT0

Function

Serial Input Format IF1 - Left Justified

Serial Input Format IF2 - I²S

Serial Input Format IF3 - Right-Justified, 24-bit data

Serial Input Format IF4 - Right-Justified, 16-bit data

Table 3. Hardware Mode Serial Audio Port Format Selection

HWCK1 HWCK0

Function

OMCK Frequency is 256*Fs

OMCK Frequency is 128*Fs

OMCK Frequency is 512*Fs

OMCK Frequency is 256*Fs

Table 4. Hardware Mode OMCK Clock Ratio Selection

SISF

SIRES1/0 SIJUST

SIDEL

SISPOL

SILRPOL

IF1 - Left Justified

IF2 - I²S

IF3 - Right-Justified, 24-bit data

IF4 - Right-Justified, 16-bit data

Table 5. Equivalent Register Settings of Serial Audio Input Formats in Hardware Mode

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