TLC320AD90C Datasheet, PDF (15/51 Pages) Texas Instruments – Stereo Audio Codec

The TLC320AD90C data streams, per the AC‘97 specification, are the following:
• PCM playback has two output slots with a two channel composite PCM output stream
• PCM record has two input slots with a two channel composite PCM input stream
• Control has two output slots with a Control register write port
• Status has two input slots with a Control register read port
• Additional data streams are defined in the AC‘97 specification but their functionality are not
implemented in the TLC320AD90C
The AC‘97 audio frame is shown in Figure 2–1.
SLOT
01
2
3
4
5
67
89
10 11 12
SYNC
SDATA_OUT
CMD CMD PCM PCM
TAG _{Addr Data Left Right} Rsrvd Rsrvd Rsrvd Rsrvd Rsrvd Rsrvd Rsrvd Rsrvd
SDATA_IN
StatusStatus PCM PCM
TAG _{Addr Data Left Right} Rsrvd Rsrvd Rsrvd Rsrvd Rsrvd Rsrvd Rsrvd Rsrvd
Data Phase = 12 Slots 20 Bits = 240 Bits
Tag Phase = 16 Bits
Figure 2–1. AC-Link Bidirectional Audio Frame (As Implemented)
2.2.1 AC-Link Signal Definitions
The AC-Link signals are shown in Figure 2–2.
SYNC
AC‘97 Compliant
Digital Controller
BIT_CLK
SDATA_OUT
SDATA_IN
TLC320AD90C
RESET
Figure 2–2. AC-Link Signals
2–2