sta335bwsqs13tr STMicroelectronics, sta335bwsqs13tr Datasheet - Page 26

• Manufacturer Part Number: sta335bwsqs13tr
• Description: 2.1-channel, High-efficiency Digital Audio System With Qsound Qhd
• Manufacturer: STMicroelectronics

Register description
6.1.2
6.1.3
26/70
Interpolation ratio select
Table 11.
The STA335BWSQS has variable interpolation (oversampling) settings such that internal
processing and DDX 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 12.
Thermal warning recovery bypass
Table 13.
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.
Bit
Bit
4:3
5
Input sample rate Fs (kHz)
RW
RW
RW
RW
IR
IR bit settings as a function of input sample rate
TWRB
176.4
44.1
88.2
192
32
48
96
RST
RST
1
00
IR[1:0]
Name
TWRB
Name
00
00
00
01
01
10
10
IR
Selects internal interpolation ratio based on input I
0: Thermal warning recovery enabled
1: Thermal warning recovery disabled
1st stage interpolation ratio
sample frequency
2 times downsampling
2 times downsampling
2 times oversampling
2 times oversampling
2 times oversampling
Description
Pass-through
Pass-through
Description
STA335BWSQS
2
S