STA326 STMicroelectronics, STA326 Datasheet - Page 27

• Manufacturer Part Number: STA326
• Description: DIG AUDIO SYSTEM, 2-CH, 36POWERSSOP
• Manufacturer: STMicroelectronics

Specifications of STA326

• Svhc: No SVHC (15-Dec-2010)
• No. Of Pins: 36
• Operating Temperature Range: -20°C To +85°C
• Supply Voltage Max: 36V
• Supply Voltage Min: 10V
• Termination T: RoHS Compliant
• Package / Case: PowerSO
• Interface: I2C
• Interface Type: I2C
• Rohs Compliant: Yes

STA326
Table 29.
For ease of use, all channels can use the biquad coefficients loaded into the channel 1
coefficient RAM space by setting the BQL bit to 1. Therefore, any EQ updates only have to
be performed once.
Table 30.
Both limiters can be used in one of two ways, anti-clipping or dynamic range compression.
When used in anti-clipping mode the limiter threshold values are constant and dependent on
the limiter settings. In dynamic range compression mode the limiter threshold values vary
with the volume settings allowing a nighttime listening mode that provides a reduction in the
dynamic range regardless of the volume level.
Table 31.
Setting the ZDE bit enables the zero-detect automatic mute. When ZDE = 1, the zero detect
circuit looks at the input data to each processing channel after the channel-mapping block. If
any channel receives 2048 consecutive zero value samples (regardless of fs) then that
individual channel is muted if this function is enabled.
Table 32.
4
5
6
7
Bit
Bit
Bit
Bit
RW
RW
RW
RW
R/W
R/W
R/W
R/W
Biquad coefficient link
Dynamic range compression/anti-clipping bit
Zero detect mute enable
Miami mode enable
0
0
1
0
RST
RST
RST
RST
BQL
DRC
ZDE
MME
Name
Name
Name
Name
Doc ID 11531 Rev 3
Miami mode enable:
0: sub mix into left/right disabled
1: sub mix into left/right enabled
Zero detect mute enable: setting of 1 enables the
automatic zero-detect mute
Biquad link:
0: each channel uses coefficient values
1: each channel uses channel 1 coefficient values
Dynamic range compression/anti-clipping
0: limiters act in anti-clipping mode
1: limiters act in dynamic range compression mode
Description
Description
Description
Description
Register description
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