CDB3308 Cirrus Logic Inc, CDB3308 Datasheet - Page 36

• Manufacturer Part Number: CDB3308
• Description: BOARD EVAL FOR CS3308 VOL CTRL
• Manufacturer: Cirrus Logic Inc

Specifications of CDB3308

• Main Purpose: Audio, Volume Control
• Embedded: No
• Utilized Ic / Part: CS3308
• Primary Attributes: 8 Single-Ended Analog Inputs and Outputs, USB or RS232 Interface
• Secondary Attributes: Graphic User Interface
• Description/function: Audio DSPs
• Operating Supply Voltage: 5 V
• Product: Audio Modules
• For Use With/related Products: CS3308
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 598-1496

36
7.8
7.8.1
7.9
7.10
7.10.1 Master 1 Volume Control (Bits 7:0)
M1_Ch8M
Reserved
M1_Vol7
7
7
7
Freeze Control - Address 0Fh
Master 1 Mask - Address 10h
Each bit in this register serves as a Master 1 mask for its corresponding channel.
If a mask bit is set to ‘1’, the corresponding channel is unmasked, meaning that it will be affected by the
Master 1 volume and muting controls.
If a mask bit is set to ‘0’, the corresponding channel is masked, meaning that it will not be affected by the
Master 1 volume and muting controls.
This register defaults to FFh (all channels unmasked).
Master 1 Volume - Address 11h
Freeze (Bit 7)
Default = 0
Function:
Default = 11010010
Function:
When the Freeze bit is set, the Freeze function allows modifications to the control port registers with-
out changes taking effect until Freeze bit is cleared. To make multiple changes in the Control Port
registers take effect simultaneously, set the Freeze bit, make all register changes, then clear the
Freeze bit.
The Master 1 volume control register allows the user to simultaneously gain or attenuate all un-
masked channels in 0.5 dB increments. The volume changes are implemented as dictated by the ZC-
Mode[1:0] and TimeOut[2:0] bits in the Device Config 2 register (see
Address 0Ch” on page
The value of the Master 1 volume control register is mapped to the desired 0.5 dB step Master 1 vol-
ume setting by the following equation:
In the equation above, “Desired Volume Setting in dB” is determined by rounding the desired ¼ dB
resolution volume setting down to ½ dB resolution.
It should be noted that input values outside the CS3308’s analog range of +22 dB to -96 dB are valid,
however, the volume of each channel will be limited to the CS3308’s analog range (see
its” on page
See
M1_Ch7M
Reserved
M1_Vol6
Table 5 on page 31
6
6
6
20).
M1_Ch6M
Reserved
M1_Vol5
Register Value
5
5
5
34).
for example register settings.
M1_Ch5M
Reserved
M1_Vol4
4
4
4
=
(
2
×
Desired Volume Setting in dB
M1_Ch4M
Reserved
M1_Vol3
3
3
3
M1_Ch3M
Reserved
M1_Vol2
2
2
2
)
“Device Configuration 2 -
+
M1_Ch2M
Reserved
M1_Vol1
210
1
1
1
“Volume Lim-
M1_Ch1M
CS3308
M1_Vol0
Freeze
DS702F1
0
0
0