cs4365 Cirrus Logic, Inc., cs4365 Datasheet - Page 43

• Manufacturer Part Number: cs4365
• Description: 114 Db, 192 Khz 6-channel D/a Converter
• Manufacturer: Cirrus Logic, Inc.

DS670F2
6.11
6.11.1 Digital Volume Control (xx_VOL7:0)
xx_VOL7
0
7
Volume Control (address 0Bh, 0Ch, 0Eh, 0Fh, 11h, 12h)
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
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
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
by taking the decimal value of the volume register and multiplying by 6.02/12.
ATAPI4
1
1
1
1
1
1
1
1
1
1
1
1
1
xx_VOL6
6
0
ATAPI3
0
0
0
0
0
1
1
1
1
1
1
1
1
xx_VOL5
Binary Code
ATAPI2
00000000
00000001
00000110
5
0
11111111
0
1
1
1
1
0
0
0
0
1
1
1
1
Table 10. Example Digital Volume Settings
ATAPI1
xx_VOL4
Table 9. ATAPI Decode Table
1
0
0
1
1
0
0
1
1
0
0
1
1
0
4
Table 10
Decimal Value
ATAPI0
xx_VOL3
1
0
1
0
1
0
1
0
1
0
1
0
1
255
are approximate. The actual attenuation is determined
0
1
6
3
0
Table
[(aL+bR)/2]
[(aL+bR)/2]
[(bL+aR)/2]
[(aL+bR)/2]
AOUTAx
xx_VOL2
MUTE
aR
aR
aR
aR
aL
aL
aL
aL
Volume Setting
2
0
10. The volume changes are imple-
-127.5 dB
-0.5 dB
-3.0 dB
0 dB
xx_VOL1
0
1
[(bL+aR)/2]
[(aL+bR)/2]
[(aL+bR)/2]
[(aL+bR)/2]
AOUTBx
MUTE
MUTE
MUTE
bR
bR
bR
bL
bL
bL
xx_VOL0
CS4365
0
0
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