sta381bws STMicroelectronics, sta381bws Datasheet - Page 58

• Manufacturer Part Number: sta381bws
• Description: Sound Terminal 2.1-channel High-efficiency Digital Audio System Sound Terminal 2.1-channel High-efficiency Digital Audio System
• Manufacturer: STMicroelectronics

Register description: New Map
Note:
6.13.2
6.13.3
58/168
Table 28.
(*): Clock is BICKI
Interpolation ratio selection
Table 29.
The STA381BWS has variable interpolation (oversampling) settings such that internal
processing and FFX output rates remain consistent. The first processing block interpolates
by either 3-times
provides a 2-times downsample. The oversampling ratio of this interpolation is determined
by the IR bits.
Table 30.
Fault-detect recovery bypass
Table 31.
32, 44.1, 48
88.2, 96
176.4, 192
Input sample
Bit
Bit
4:3
7
fs (kHz)
Input sample rate fs (kHz)
rate
R/W
R/W
R/W
R/W
Input sampling rates
Internal interpolation ratio
IR bit settings as a function of input sample rate
Fault-detect recovery bypass
176.4
44.1
88.2
192
32
48
96
1X
00
01
IR
(Table 84.: PLL register 0x56 bits
RST
RST
0
00
64*fs(*)
64*fs(*) 32*fs(*)
64*fs(*) 32*fs(*)
111
IR [1:0]
Name
Doc ID 018937 Rev 2
Name
FDRB
110
NA
00
00
00
01
01
10
10
IR
Selects internal interpolation ratio based on input I
sample frequency
576 * fs 128 * fs 256 * fs 384 * fs 512 * fs 768 * fs
101
NA
NA
0: fault-detect recovery enabled
1: fault-detect recovery disabled
64 * fs
32 * fs
100
MCS[2:0]
D0), 2-times or 1-time (pass-through) or
1st stage interpolation ratio
128 * fs 192 * fs 256 * fs 384 * fs
2 times downsampling
2 times downsampling
2 times oversampling
2 times oversampling
2 times oversampling
64 * fs
011
Description
Pass-through
Pass-through
Description
96 * fs
010
128 * fs 192 * fs
001
STA381BWS
2
000
S