CS44600
7.10
Channel XX Volume Control - Integer (addresses 09h - 0Eh)
6
CHXX_IVOL6
5
CHXX_IVOL5
4
CHXX_IVOL4
3
CHXX_IVOL3
2
CHXX_IVOL2
1
CHXX_IVOL1
0
CHXX_IVOL0
7
CHXX_IVOL7
7.10.1 Channel Volume Control - Integer (CHXx_IVOL[7:0])
Default = 00000000
Function:
The Channel X Volume Control - Integer register allows global control of the signal levels on all channels
in 1 dB increments from +24 to -127 dB. Volume settings are decoded as shown in Table 6. The volume
changes are implemented as specified by the Soft and Zero Cross bits (SZC[1:0]. All volume settings
greater than 00011000b are equivalent to +24 dB. Binary values for integer volume settings less than
0 dB are in two’s complement form.
CHXX_IVOL[7:0]
0001 1000
0001 0111
0000 0001
0000 0000
1111 1111
1111 1110
1000 0001
Hex Value
18
17
01
00
FF
FE
81
Volume Setting
+24 dB
+23 dB
+1 dB
0 dB
-1 dB
-2 dB
-127 dB
Table 8. Channel Integer Volume Settings
7.11
Channel XX Volume Control1 - Fraction (address 11h)
6
CHB2_FVOL0
5
CHA2_FVOL1
4
CHA2_FVOL0
3
CHB1_FVOL1
2
CHB1_FVOL0
1
CHA1_FVOL1
0
CHA1_FVOL0
7
CHB2_FVOL1
7.12
Channel XX Volume Control2 - Fraction (address 12h)
6
RESERVED
5
RESERVED
4
RESERVED
3
CHB3_FVOL1
2
CHB3_FVOL0
1
CHA3_FVOL1
0
CHA3_FVOL0
7
RESERVED
7.12.1 Channel Volume Control - Fraction (CHXX_FVOL[1:0])
Default = 00
00 - +0.00 dB
01 - +0.25 dB
10 - +0.50 dB
11 - +0.75 dB
Function:
The Channel X Volume Control - Fraction register is an additional offset to the value in the Channel Vol-
ume Control - Integer register and allows global control of the signal levels on all channels in 0.25 dB in-
crements. Volume settings are decoded as shown in Table 7. These volume changes are implemented
as specified by the Soft and Zero Cross bits (SZC[1:0]). All volume settings greater than 00011000b are
equivalent to +24 dB. Binary values for integer and fractional volume settings less than 0 dB are in two’s
complement form.
See
“Master Volume Control - Fraction (address 08h)” on page 57
for hints on converting decimal num-
bers to 2’s complement binary values.
DS633F1
57
CIRRUS [ CIRRUS LOGIC ]
