CDB44800 Cirrus Logic Inc, CDB44800 Datasheet - Page 57

• Manufacturer Part Number: CDB44800
• Description: BOARD EVAL FOR CS44800 PWM CTRL
• Manufacturer: Cirrus Logic Inc
• Series: Popguard®r

Specifications of CDB44800

• Amplifier Type: Class D
• Output Type: 8-Channel
• Voltage - Supply: 20 V ~ 50 V
• Operating Temperature: -10°C ~ 70°C
• Board Type: Fully Populated
• Utilized Ic / Part: CS44800
• Description/function: Audio DSPs
• Operating Supply Voltage: 5 V
• Product: Audio Modules
• For Use With/related Products: CS44800
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Max Output Power X Channels @ Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 598-1532; CDB-44800

DS632F1
7.8
7.8.1
7.9
7.9.1
MSTR_IVOL7
RESERVED
7
7
Master Volume Control - Integer (address 07h)
Master Volume Control - Fraction (address 08h)
Master Volume Control - Integer (MSTR_IVOL[7:0])
Default = 00000000
Function:
The Master 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.
Master Volume Control - Fraction (MSTR_FVOL[1:0])
Default = 00
00 - +0.00 dB
01 - +0.25 dB
10 - +0.50 dB
11 - +0.75 dB
Function:
The Master Volume Control - Fraction register is an additional offset to the value in the Master Volume
Control - Integer register and allows global control of the signal levels on all channels in 0.25 dB incre-
ments. 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.
To calculate from a positive decimal integer:fraction value to a binary positive integer:fraction value, do
the following:
1. Convert the decimal integer to binary. This is MSTR_IVOL[7:0].
2. Select the bit representation of the desired 0.25 fractional increment. This is MSTR_FVOL[1:0].
To calculate from a negative decimal integer:fraction value to a binary, 2’s complement integer:fraction
value, do the following:
MSTR_IVOL6
RESERVED
6
6
MSTR_IVOL[7:0]
0001 1000
0000 0001
0000 0000
1000 0001
0001 0111
1111 1110
1111 1111
MSTR_IVOL5
RESERVED
5
5
Table 6. Master Integer Volume Settings
MSTR_IVOL4
RESERVED
4
4
Hex Value
FF
FE
18
17
01
00
81
MSTR_IVOL3
RESERVED
3
3
Volume Setting
MSTR_IVOL2
RESERVED
-127 dB
+24 dB
+23 dB
+1 dB
-1 dB
-2 dB
0 dB
2
2
MSTR_FVOL1
MSTR_IVOL1
1
1
CS44800
MSTR_FVOL0
MSTR_IVOL0
0
0
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