STA306 STMicroelectronics, STA306 Datasheet - Page 19

• Manufacturer Part Number: STA306
• Description: Multimedia Misc AUDIO SYSTEMS
• Manufacturer: STMicroelectronics
• Type: Audio Processorr

Specifications of STA306

• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 20 C
• Mounting Style: SMD/SMT
• Package / Case: TQFP-64
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

STA306
3.14 Channel 6 Volume (address 0Eh)
BIT
D7
D6
D5
D4
D3
D2
D1
D0
NAME
C6V7
C6V6
C6V5
C6V4
C6V3
C6V2
C6V1
C6V0
RST
0
0
1
1
0
0
0
0
The Volume structure of the STA306 consists of individual volume registers for each channel and a master vol-
ume register that provides an offset to each channels volume setting. The individual channel volumes are ad-
justable in 0.5dB steps from +24dB to -103dB. As an example if C5V = 0Bh or +18.5dB and MV = 21h or -
16.5dB, then the total gain for channel 5 = +2dB. The Master Mute when set to 1 will mute all channels at once,
whereas the individual channel mutes(CxM) will mute only that channel. Both the Master Mute and the Channel
Mutes provide a "soft mute" with the volume ramping down to mute in 8192 samples from the maximum volume
setting at the internal processing rate(~192kHz). A "hard mute" can be obtained by commanding a value of all
1's(255) to any channel volume register or the master volume register. When volume offsets are provided via
the master volume register any channel that whose total volume is less than -103dB will be muted. All changes
in volume take place at zero-crossings when ZCE = 1(configuration register B) on a per channel basis as this
creates the smoothest possible volume transitions. When ZCE=0, volume updates will occur immediately.
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