STA339BWTR STMicroelectronics, STA339BWTR Datasheet - Page 34

• Manufacturer Part Number: STA339BWTR
• Description: DIG AUDIO SYSTEM, 2-CH, 36POWERSSOP
• Manufacturer: STMicroelectronics

Specifications of STA339BWTR

• Svhc: No SVHC (15-Dec-2010)
• No. Of Pins: 36
• Operating Temperature Range: -20°C To +70°C
• Supply Voltage Max: 26V
• Supply Voltage Min: 5V
• Termination T: RoHS Compliant
• Package / Case: PowerSSO
• Interface: I2C
• Interface Type: I2C
• Rohs Compliant: Yes

Register description
6.3.3
6.4
6.4.1
6.4.2
6.4.3
34/77
Overcurrent warning detect adjustment bypass
Table 27.
The OCWARN input is used to indicate an overcurrent warning condition. When OCWARN
is asserted (set to 0), the power control block forces an adjustment to the modulation limit
(default is -3 dB) in an attempt to eliminate the overcurrent warning condition. Once the
overcurrent warning volume adjustment is applied, it remains in this state until reset is
applied. The level of adjustment can be changed via the TWOCL (thermal warning /
overcurrent limit) setting which is address 0x37 of the user defined coefficient RAM.
Configuration register D (addr 0x03)
High-pass filter bypass
Table 28.
The STA339BW features an internal digital high-pass filter for the purpose of AC coupling.
The purpose of this filter is to prevent DC signals from passing through a FFX amplifier. DC
signals can cause speaker damage. When HPB = 0, this filter is enabled.
De-emphasis
Table 29.
DSP bypass
Table 30.
Setting the DSPB bit bypasses the EQ function of the STA339BW.
7
0
1
2
Bit
Bit
Bit
Bit
SME
D7
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Overcurrent warning bypass
High-pass filter bypass
De-emphasis
DSP bypass
ZDE
D6
1
1
0
0
0
RST
RST
RST
RST
OCRB
HPB
DEMP
DSPB
DRC
D5
0
Doc ID 15251 Rev 5
Name
Name
Name
Name
BQL
D4
0
0: overcurrent warning adjustment enabled
1: overcurrent warning adjustment disabled
Setting of one bypasses internal AC coupling digital
high-pass filter
0: No de-emphasis
1: Enable de-emphasis on all channels
0: Normal operation
1: Bypass of biquad and bass/treble functions
PSL
D3
0
DSPB
Description
Description
Description
Description
D2
0
DEMP
D1
0
STA339BW
HPB
D0
0