CS3318 Datasheet, PDF (18/44 Pages) Cirrus Logic – 8-Channel Analog Volume Control

CS3318
Combining the multiple group addressing capabilities of the CS3318 (as detailed in section 5.8.2 on
page 24) with the internal master control mapping abilities described above allows the configuration and
direct addressing of multiple logical groups of channels across multiple CS3318 devices within a system.
Referenced Control
Register Location
Master X Mask .................... “Master 1 Mask - Address 10h” on page 36
“Master 2 Mask - Address 13h” on page 37
“Master 3 Mask - Address 16h” on page 38
5.4.2
Volume & Muting Control Implementation
Figure 6 below diagrams in detail the volume and muting control architecture of the CS3318 for an arbi-
trary channel ‘N’.
This diagram incorporates all volume and muting control concepts presented in sections 5.4 - 5.6; it is
included as a reference and will serve to corroborate the information presented in these sections.
Ch. N - Volume
Register N
Ch. N - ¼ dB Control
Register 09h, Bit N-1
Ch. N Master 1 Mask
Register 10h, Bit N-1
Ch. N Master 2 Mask
Register 13h, Bit N-1
Ch. N Master 3 Mask
Register 16h, Bit N-1
Σ
Mask 1
Mask 2
Mask 3
Mute if result is
less than -96 dB.
Hardware Mute Input
Pin 4
Mute Input Enable
Register 0Bh, Bit 5
Channel N - Mute
Register 0Ah, Bit N-1
Σ
Σ
Σ
Limit Volume Result
-96 dB to +22 dB
Mute
Σ
Mask 1
Σ
Mask 2
Σ
Mask 3
Master 1 - Volume
Register 11h
Master 1 - ¼ dB
Register 12h, Bit 0
Master 2 - Volume
Register 14h
Master 2 - ¼ dB
Register 15h, Bit 0
Master 3 - Volume
Register 17h
Master 3 - ¼ dB
Register 18h, Bit 0
Master 1 - Mute
Register 12h, Bit 1
Mask 1
Master 2 - Mute
Register 15h, Bit 1
Mask 2
Master 3 - Mute
Register 18h, Bit 1
Mask 3
Input
+
_
Output
REFI
Channel N
REFO
Figure 6. Volume & Muting Control Implementation
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DS693F1