Cirrus Logic CS3318 - Manual (Page 37)

DS693F1 37
CS3318
7.11 Master 1 Control - Address 12h
7.11.1 Master 1 Mute (Bit 1)
Default = 0
Function:
This bit controls the Master 1 mute state. When set, the Master 1 mute condition is active. When
cleared, the Master 1 mute condition is released.
See “Muting Controls” on page 21 for more information about the muting behavior of the CS3318.
7.11.2 Master 1 ¼ dB Control (Bit 0)
Default = 0
Function:
When set, ¼ dB of gain will be added to the Master 1 volume level.
See Table 6 on page 32 for an example of volume settings using the ¼ dB control.
7.12 Master 2 Mask - Address 13h
Each bit in this register serves as a Master 2 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 2 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 2 volume and muting controls.
This register defaults to FFh (all channels unmasked).
7.13 Master 2 Volume - Address 14h
7.13.1 Master 2 Volume Control (Bits 7:0)
Default = 11010010
Function:
The Master 2 volume control register allows the user to simultaneously gain or attenuate all un-
masked channels from +22 dB to -96 dB in 0.5 dB increments. The volume changes are implemented
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 34 ).
The value of the Master 2 volume control register is mapped to the desired 0.5 dB step Master 2 vol-
ume setting by the following equation:
7 6 5 4 3 2 1 0
Reserved Reserved Reserved Reserved Reserved Reserved M1_Mute M1_Qtr
7 6 5 4 3 2 1 0
M2_Ch8M M2_Ch7M M2_Ch6M M2_Ch5M M2_Ch4M M2_Ch3M M2_Ch2M M2_Ch1M
7 6 5 4 3 2 1 0
M2_Vol7 M2_Vol6 M2_Vol5 M2_Vol4 M2_Vol3 M2_Vol2 M2_Vol1 M2_Vol0
Register Value 2 Desired Volume Setting in dB
Ч ( ) 210
+ =