CDB3318 Cirrus Logic Inc, CDB3318 Datasheet - Page 32

• Manufacturer Part Number: CDB3318
• Description: Eval Bd - 8-channel Digital Vol Cntrl
• Manufacturer: Cirrus Logic Inc

Specifications of CDB3318

• Main Purpose: Audio, Volume Control
• Embedded: No
• Utilized Ic / Part: CS3318
• Primary Attributes: 8 Single-Ended Analog Inputs and Outputs, USB or RS232 Interface
• Secondary Attributes: Graphical User Interface
• Description/function: Audio DSPs
• Operating Supply Voltage: 8 V to 9 V
• Product: Audio Modules
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: CS3310
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant, Contains lead / RoHS non-compliant
• Other names: 598-1497

32
7.2
7.2.1
Quarter8
7
¼ dB Control - Address 09h
¼ dB Control (Bit 0 - 7)
Default = 0
Function:
When set, ¼ dB of gain will be added to each bit’s respective channel. The volume changes are im-
plemented as dictated by the ZCMode[1:0] and TimeOut[2:0] bits in the Device Config 2 register (see
“Device Configuration 2 - Address 0Ch” on page
It should be noted that input values outside the CS3318’s analog range of +22 dB to -96 dB are valid;
however, the volume of each channel will be limited to the CS3318’s analog range (see
its” on page
Table 6
Quarter7
6
Volume Control Register
Setting (Reg 01h - 08h)
shows example volume settings using the ¼ dB control.
20).
00010100
00010010
00010010
11010100
11010011
11010011
11010010
11010010
11010001
11010001
11010000
11010000
00010011
00010011
11111110
11111101
11111101
11111100
11111100
Quarter6
-
-
5
Quarter5
Table 6. Example Volume Settings
4
Corresponding QuarterX
Bit Setting
Quarter4
0
1
0
1
0
0
1
0
1
0
1
0
1
0
0
1
0
1
0
34).
-
-
3
Quarter3
2
Individual Volume
Quarter2
+21.75
+21.25
-95.25
-95.75
+21.5
+0.75
+0.25
-0.25
-0.75
-95.5
+0.5
+22
+21
-0.5
-95
-96
1
+1
-1
0
-
-
ChX
“Volume Lim-
CS3318
(dB)
Quarter1
DS693F1
0