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CS4218 数据表(PDF) 21 Page - Cirrus Logic

部件名 CS4218
功能描述  16-Bit Stereo Audio Codec
PDF  44 Pages
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制造商  CIRRUS [Cirrus Logic]
网页  http://www.cirrus.com
标志 CIRRUS - Cirrus Logic

CS4218 数据表(HTML) 21 Page - Cirrus Logic

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ignored and the sample frequency is linearly
scaled with SCLK. (The CLKIN pin must be
tied low.) This mode also fixes SCLK at 256 bits
per frame with MF7:SFS1 and MF8:SFS2 select-
ing the particular sub-frame. This master
clocking option is not available in the multiplier
(SM3-MS) sub-mode.
Multiplier Sub-Modes (SM3-MM and
SM3-MS)
The SM3 Multiplier sub-modes are identical to
the SM3-M and SM3-S sub-modes with the fol-
lowing exceptions:
• Set SMODE1 = SMODE2 = SMODE3 = 0.
This selects SM3 Multiplier mode.
• CLKIN must be 16*Fs, as opposed to
256*Fs used for SM3-M and SM3-S.
• A 0.47uF capacitor must be connected to the
FILT pin as shown in Figure 8.
Master / Slave setup, frame formats, and sample
rate selection are identical to SM3-M and SM3-
S. Please note that the MF1:F1 = MF2:F2 = 1
slave configuration supported by the SM3-S sub-
mode it not available in SM3-MS sub-mode.
Sub-frame 1
FRAME (n+1)
Word A
Word B
Sub-frame 1
Word A
Word B
FRAME n
64 SCLK Periods
FRAME (n+2)
Sub-frame 1
Word A
Word B
FRAME (n+3)
Sub-frame 1
Word A
Word B
SSYNC
DATA
SFS2
SFS1 frame
00
1
MF8: MF7: Sub-
Figure 16. SM3-S and SM3-MS - 64 BPF; MF1:F1, MF2:F2 = 00
Sub-frame 1
Sub-frame 2
FRAME (n+1)
Word A
Word B
Word A
Word B
Sub-frame 1
Word A
Word B
FRAME n
128 SCLK Periods
Sub-frame 2
Word A
Word B
FRAME (n+2)
Sub-frame 1
Word A
Word B
SSYNC
DATA
SFS2
SFS1 frame
0
0
0
1
1
2
MF8: MF7: Sub-
Figure 17. SM3-S and SM3-MS - 128 BPF; MF1:F1, MF2:F2 = 01
Sub-frame 1
Sub-frame 2
Sub-frame 3
Sub-frame 4
FRAME (n+1)
Word A
Word B
Word A
Word B
Word A
Word B
Word A
Word B
FRAME n
Sub-frame 1
Word A
Word B
256 SCLK Periods
SSYNC
DATA
SFS2
SFS1 frame
0
0
1
1
0
1
0
1
1
2
3
4
MF8:
MF7: Sub-
Figure 18. SM3-S and SM3-MS - 256 BPF; MF1:F1, MF2:F2 = 10
CS4218
DS135F1
21



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