BT830

Datasheet

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8.12 Digital Audio Interface (I²S)

The digital audio interface supports the industry standard formats for I²S, left-justified or right-justified. The

interface shares the same pins as the PCM interface which means each audio bus is mutually exclusive in its

usage. Table 12 lists these alternative functions. Figure 11 shows the timing diagram.

Table 12: Alternative Functions of the Digital Audio Bus Interface on the PCM Interface.

PCM Interface

I²S Interface

PCM_OUT

SD_OUT

PCM_IN

SD_IN

PCM_SYNC

WS

PCM_CLK

SCK

Figure 13: PCM Configuration

The internal representation of audio samples within BT830is 16-bit and data on SD_OUT is limited to 16-bit per

channel.

Table 13: Digital Audio Interface Slave Timing

Symbol

Parameter

Min

Typ

Max

Unit

-

SCK Frequency

-

-

6.2

MHz

-

WS Frequency

-

-

96

kHz

SCK high time

80

-

-

ns

SCK low time

80

-

-

ns