CS4365
ATAPI4
ATAPI3
ATAPI2
ATAPI1
ATAPI0
AOUTAx
MUTE
MUTE
MUTE
MUTE
aR
AOUTBx
MUTE
bR
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
bL
[(bL+aR)/2]
MUTE
bR
aR
aR
aR
aL
aL
aL
aL
bL
[(aL+bR)/2]
MUTE
bR
bL
[(aL+bR)/2]
MUTE
bR
[(aL+bR)/2]
[(aL+bR)/2]
[(bL+aR)/2]
[(aL+bR)/2]
bL
[(aL+bR)/2]
Table 9. ATAPI Decode (Continued)
5.12 Volume Control (address 0Bh, 0Ch, 0Eh, 0Fh, 11h, 12h)
7
xx_VOL7
0
6
xx_VOL6
0
5
xx_VOL5
0
4
xx_VOL4
0
3
xx_VOL3
0
2
xx_VOL2
0
1
0
xx_VOL0
0
xx_VOL1
0
These six registers provide individual volume and mute control for each of the six channels.
The values for “xx” in the bit fields above are as follows:
Register address 0Bh - xx = A1
Register address 0Ch - xx = B1
Register address 0Eh - xx = A2
Register address 0Fh - xx = B2
Register address 11h - xx = A3
Register address 12h - xx = B3
5.12.1 Digital Volume Control (xx_VOL7:0)
Default = 00h (0 dB)
Function:
The Digital Volume Control registers allow independent control of the signal levels in 1/2 dB increments
from 0 to -127.5 dB. Volume settings are decoded as shown in Table 10. The volume changes are imple-
mented as dictated by the Soft and Zero Cross bits in the Power and Muting Control register. Note that the
values in the volume setting column in Table 10 are approximate. The actual attenuation is determined by
taking the decimal value of the volume register and multiplying by 6.02/12.
Table 10. Example Digital Volume Settings
Binary Code
00000000
00000001
00000110
11111111
Decimal Value
Volume Setting
0 dB
0
1
6
-0.5 dB
-3.0 dB
-127.5 dB
255
DS670PP1
43
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