STA335W13TR View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
STA335W13TR Datasheet PDF : 43 Pages
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STA335W
Register description
5.1.2
5.1.3
5.1.4
Interpolation ratio select
Table 12. Internal interpolation ratio
Bit R/W RST
Name
Description
4:3 R/W
00
IR [1:0]
Selects internal interpolation ratio based on input I2S
sample frequency
The STA335W has variable interpolation (oversampling) settings such that internal
processing and FFX output rates remain consistent. The first processing block interpolates
by either 2-times or 1-time (pass-through) or provides a 2-times downsample. The
oversampling ratio of this interpolation is determined by the IR bits.
Table 13. IR bit settings as a function of input sample rate
Input sample rate fs (kHz)
IR
1st stage interpolation ratio
32
00
2 times oversampling
44.1
00
2 times oversampling
48
00
2 times oversampling
88.2
01
Pass-through
96
01
Pass-through
176.4
10
2 times downsampling
192
10
2 times downsampling
Thermal warning recovery bypass
Table 14. Thermal warning recovery bypass
Bit R/W RST
Name
Description
5
R/W
1
TWRB
0: Thermal warning recovery enabled
1: Thermal warning recovery disabled
If the thermal warning adjustment is enabled (TWAB = 0), then the thermal warning recovery
determines if the -3 dB output limit is removed when thermal warning is negative.
If TWRB = 0 and TWAB = 0, then when a thermal warning disappears the -3 dB output limit
is removed and the gain is added back to the system. If TWRB = 1 and TWAB = 0, then
when a thermal warning disappears the -3 dB output limit remains until TWRB is changed to
zero or the device is reset.
Thermal warning adjustment bypass
Table 15. Thermal warning adjustment bypass
Bit R/W RST
Name
Description
6
R/W
1
TWAB
0: Thermal warning adjustment enabled
1: Thermal warning adjustment disabled
The on-chip STA335W power output block provides feedback to the digital controller using
inputs to the power control block. Input TWARN is used to indicate a thermal warning
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