User's Manual

BT85x Series
Datasheet
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15
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Table 13: PCM burst mode specifications (Receive Only, Short-Frame Sync)
Ref No. Characteristics Minimum Typical Maximum Unit
1 PCM bit clock frequency - - 24 MHz
2 PCM bit clock LOW 20.8 - - ns
3 PCM bit clock HIGH 20.8 - - ns
4 PCM_SYNC setup 8 - - ns
5 PCM_SYNC_hold 8 - - ns
6 PCM_IN setup 8 - - ns
7 PCM_IN hold 8 - - ns
Figure 8 and Table 14 shows PCM Burst mode timing diagram and specifications for the receive-only mode of
long-frame sync.
Figure 8: PCM burst mode timing (Receive Only, Long Frame Sync)
Table 14: PCM burst mode specifications (Receive Only, Long-Frame Sync)
Ref No. Characteristics Minimum Typical Maximum Unit
1 PCM bit clock frequency - - 24 MHz
2 PCM bit clock LOW 20.8 - - ns
3 PCM bit clock HIGH 20.8 - - ns
4 PCM_SYNC setup 8 - - ns
5 PCM_SYNC_hold 8 - - ns
6 PCM_IN setup 8 - - ns
7 PCM_IN hold 8 - - ns
8.4. I
2
S Interface
The BT850-Sx supports two independent I
2
S digital audio ports. The I
2
S interface supports both master and slave
modes. The I
2
S signals are:
 I
2
S clock: I
2
S SCK
 I
2
S Word Select: I
2
S WS
 I
2
S Data Out: I
2
S SDO
 I
2
S Data In: I
2
S SDI