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STA335W датащи(PDF) 18 Page - STMicroelectronics

номер детали STA335W
подробное описание детали  2.0-channel high-efficiency digital audio system
PDF  43 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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STA335W датащи(HTML) 18 Page - STMicroelectronics

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Register description
STA335W
18/43
5.1.1
Master clock select
The STA335W supports sample rates of 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz,
176.4 kHz, and 192 kHz. Therefore the internal clock is:
●
32.768 MHz for 32 kHz
●
45.1584 MHz for 44.1 kHz, 88.2 kHz, and 176.4 kHz
●
49.152 MHz for 48 kHz, 96 kHz, and 192 kHz
The external clock frequency provided to the XTI pin must be a multiple of the input sample
frequency (fs).
The relationship between the input clock and the input sample rate is determined by both
the MCSx and the IR (input rate) register bits. The MCSx bits determine the PLL factor
generating the internal clock and the IR bit determines the oversampling ratio used
internally.
Table 10.
Master clock select
Bit
R/W
RST
Name
Description
0R/W
1
MCS0
Selects the ratio between the input I2S sample
frequency and the input clock.
1R/W
1
MCS1
2R/W
0
MCS2
Table 11.
Input sampling rates
Input sample rate
fs (kHz)
IR
MCS[2:0]
101
100
011
010
001
000
32, 44.1, 48
00
576 * fs
128 * fs
256 * fs
384 * fs
512 * fs
768 * fs
88.2, 96
01
NA
64 * fs
128 * fs
192 * fs
256 * fs
384 * fs
176.4, 192
1X
NA
32 * fs
64 * fs
96 * fs
128 * fs
192 * fs



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