TCM320AC46 Datasheet, PDF (8/19 Pages) Texas Instruments – GEBERAL-PURPOSE AUDIO INTERFACE FOR DSP

TCM320AC46
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GENERALĆPURPOSE AUDIO INTERFACE FOR DSP
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SLWS001 − D4091, JUNE 1993
Table 2. Receive Data Bit Definitions
BIT NO.
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
COMPANDED MODE
CD7
CD6
CD5
CD4
CD3
CD2
CD1
CD0
−
−
−
−
−
−
−
−
LINEAR MODE
LD12
LD11
LD10
LD9
LD8
LD7
LD6
LD5
LD4
LD3
LD2
LD1
LD0
V2
V1
V0
relationship between data word and frame sync
Volume control and other control bits always follow the PCM data in time:
Bit No.
0
1
23
45
6
7
8
9 10 11 12 13 14 15
FSX/FSR
Fixed Data Rate
FSX/FSR
Variable Data Rate
Companded Mode: _MSB
(sign bit)
CD7 CD6
CD5 CD4
LSB
CD3 CD2 CD1 CD0
Companded Data
Command Word
Linear Mode: MSB
(sign bit)
LD12 LD11 LD10 LD9 LD8 LD7 LD6 LD5 LD4 LD3 LD2 LD1 LD0 V2 V1 V0
LSB
where:
Linear Data
Time
CD7−CD0 = Data word when in companded mode
−− = Unused bits in companded mode
V2, V1, V0 = Volume (attenuation control) 000 = maximum volume, 3 dBm0
111 = minimum volume, −18 dBm0
LD12−LD0 = Data word when in linear mode
Volume Control
8
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