20
Audio Path (continued)
U6000
TAS1020
Controller
USB
TDMA in
U7000
TM320DA705
DSP
TDMA out
ADC
DAC
X3
U4000
AK4626A
CODEC
AUX IN
BASS1/BASS2
LS/RS
LC/RC
U9100
NJM3414A
BUFFER
HEADPHONE
OUTPUT
TO
POWER
AMP
Companion 5 Audio Path
Signal Routing and Clocking
ANALOG STEREO
USB
TDMA, 8 slot: U6000 Provides Clock, Frame Sync
USB Audio Input
Audio information from the Personal Computer can contain anywhere from two to six channels of information.
This data is transferred from the USB controller to the DSP on the TDM data line connected to U6000.38
(unnamed on the schematic).
Slot Assignments for data from the USB Controller to the DSP are:
Time Slot
Audio Data
1 Left
2 Right
3 Center
4 LFE
5 Left
Surround
6 Right
Surround
7 Not
Used
8 Not
Used
DSP audio output
Audio information is transmitted to the CODEC from the DSP on TDM data line DA_DATA1 (U7000.134).
Slot assignments for Audio data from the DSP to the Codec are:
Time Slot
Audio Data
Muted
1
Left Channel (Inner)
Left Headphone
2
Right Channel (Inner)
Right Headphone
3
Left Surround (Outer)
Don’t Care
4
Right Surround (Outer)
Don’t Care
5 Bass
Don’t
Care
6 Bass
Don’t
Care
7 Don’t
Care Don’t
Care
8 Don’t
Care Don’t
Care
