Channel Xx Volume Control - Integer (Addresses 09H - 0Eh); Channel Volume Control - Integer (Chxx_Ivol[7:0]); Channel Xx Volume Control1 - Fraction (Address 11H); Channel Xx Volume Control2 - Fraction (Address 12H) - Cirrus Logic CS44600 Manual

7.10

Channel XX Volume Control - Integer (addresses 09h - 0Eh)

7 6
CHXX_IVOL7 CHXX_IVOL6

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.
7.11

Channel XX Volume Control1 - Fraction (address 11h)

7 6
CHB2_FVOL1 CHB2_FVOL0
7.12

Channel XX Volume Control2 - Fraction (address 12h)

7 6
RESERVED 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
bers to 2's complement binary values.
DS633F1
5 4
CHXX_IVOL5 CHXX_IVOL4
CHXX_IVOL[7:0]
0001 1000
0001 0111
0000 0001
0000 0000
1111 1111
1111 1110
1000 0001

Table 8. Channel Integer Volume Settings

5 4
CHA2_FVOL1 CHA2_FVOL0
5 4
RESERVED RESERVED
3
CHXX_IVOL3 CHXX_IVOL2
Hex Value Volume Setting
18
17
01
00
FF
FE
81 -127 dB
3
CHB1_FVOL1 CHB1_FVOL0
3
CHB3_FVOL1 CHB3_FVOL0
CS44600
2 1
CHXX_IVOL1
+24 dB
+23 dB
+1 dB
0 dB
-1 dB
-2 dB
2 1
CHA1_FVOL1 CHA1_FVOL0
2 1
CHA3_FVOL1 CHA3_FVOL0
for hints on converting decimal num-
0
CHXX_IVOL0
0
0
57