STA381BWSTR STMicroelectronics, STA381BWSTR Datasheet - Page 156

• Manufacturer Part Number: STA381BWSTR
• Description: Audio DSPs Sound Terminal 2.1 High EFF Dig Audio
• Manufacturer: STMicroelectronics

Specifications of STA381BWSTR

• Product Category: Audio DSPs
• Rohs: yes
• Operating Supply Voltage: 4.5 V to 25.5 V
• Operating Temperature Range: 0 C to + 150 C
• Mounting Style: SMD/SMT
• Package / Case: VQFN-48
• Snr: 100 dB

Register description: Sound Terminal compatibility
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Table 172. Zero-detect threshold
Table 173. Zero-detect hysteresis
The above thresholds and hysteresis table can be overridden and the low-level threshold
and high-level threshold can be set by the MTH[21:0] bits.
To activate the manual thresholds the FINETH bit has to be set to ‘1’.
To configure the low threshold, the WTHL bit must be set to ‘1’ so that any write operation to
the MTH bits will set the low threshold.
To configure the low threshold, the WTHH bit must be set to ‘1’ so that any write operation to
the MTH bits will set the low threshold.
If the zero-mute block does not detect mute, it will mute the output when the current RMS
value falls below the low threshold.
If the zero-mute block does not detect mute, it will unmute the output when the current RMS
value rises above the high threshold.
ZMTH[2:0]
HSEL[1:0]
000
001
010
011
100
101
110
111
00
01
10
11
Doc ID 018937 Rev 6
Equivalent input level hysteresis (dB)
Equivalent input level (dB)
-102
-108
-114
-114
-78
-84
-90
-96
3
4
5
6
STA381BWS