Functional description

STA335ML

10/20

Doc ID 17638 Rev 4

4

Functional description

4.1

Serial audio interface protocols

The STA335ML serial audio input interfaces with standard digital audio components and

accepts serial data formats. The STA335ML always acts as a slave when receiving audio

input from standard digital audio components. Serial data for two channels is provided using

3 input pins: left/right clock LRCKI (pin 29), serial clock BICKI (pin 28), and serial data SDI

(pin 30).

The available formats are given in Figure 6 and Figure 7. Pin FMT (pin 2) selects the format

Figure 6.

Figure 7.

Left-justified

1

n

2 3

BICKI

SDI

LRCKI

n

n

3

2

1

3

2

1

1

n

n

2 3

1

2 3

SDATAI

BICKI

LRCKI