17 master3 control - address 18h, 1 master3 mute (bit 1), 2 master3 ¹db control (bit 0) – Cirrus Logic CS3308 User Manual
Page 39: 17 master 3 control - address 18h, Cs3308
DS702F1
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CS3308
as dictated by the ZCMode[1:0] and TimeOut[2:0] bits in the Device Config 2 register (see
Configuration 2 - Address 0Ch” on page 34
).
The value of the Master 3 volume control register is mapped to the desired 0.5 dB step Master 3 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
).
for example register settings.
7.17
Master 3 Control - Address 18h
7.17.1
Master 3 Mute (Bit 1)
Default = 0
Function:
This bit controls the Master 3 mute state. When set, the Master 3 mute condition is active. When
cleared, the Master 3 mute condition is released.
for more information about the muting behavior of the CS3308.
7.17.2
Master 3 ¼ dB Control (Bit 0)
Default = 0
Function:
When set, ¼ dB of gain will be added to the Master 3 volume level.
for an example of volume settings using the ¼ dB control.
7
6
5
4
3
2
1
0
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
M3_Mute
M3_Qtr
Register Value
2
Desired Volume Setting in dB
Ч
(
) 210
+
=