WM8734 ETC-unknow, WM8734 Datasheet - Page 26

• Manufacturer Part Number: WM8734
• Description: Stereo Audio Codec
• Manufacturer: ETC-unknow

WM8734
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The exact sample rates achieved are defined by the relationships in Table 11 below.
128/192fs NORMAL MODE
The Normal Mode sample rates are designed for standard 256fs and 384fs MCLK rates. However the
WM8734 is also capable of being clocked from a 128 or 192fs MCLK for application over limited
sampling rates as shown in the table below.
Table 12 128fs Normal Mode Sample Rate Look-up Table
512/768fs NORMAL MODE
512 fs and 768 fs MCLK rates can be accommodated by using the CLKIDIV2 bit. The core clock to
the DSP will be divided by 2 so an external 512/768 MCLK will become 256/384 fs internally and the
device otherwise operates as in Table 8 but with MCLK at twice the specified rate. See Table 6 for
software control.
Table 11 Normal Mode Actual Sample Rates
SAMPLING
ADC
KHz
44.1
TARGET
48
SAMPLING
RATE
KHz
44.1
88.2
32
48
96
RATE
8
DAC
KHz
44.1
48
12.288MHz/256 x 1/6
12.288MHz/256 x 2/3
12.288MHz/256 x 2
MCLK=12.288
not available
not available
12.288MHz/256
FREQUENCY
KHz
5.6448
8.4672
32
48
96
MCLK
6.144
9.216
8
MHz
BOSR=0
(256fs)
BOSR
11.2896MHz/256 x 2/11
MCLK=11.2896
11.2896MHz/384 x 2
0
1
0
1
not available
11.2896MHz/256
not available
not available
8.018
KHz
44.1
88.2
ACTUAL SAMPLING RATE
SR3
REGISTER SETTINGS
0
0
1
1
SAMPLE
RATE
SR2
1
1
1
1
18.432MHz/384 x 1/6
18.432MHz/384x 2/3
18.432MHz/384 x 2
MCLK=18.432
not available
not available
18.432MHz/384
KHz
SR1
32
48
96
8
1
1
1
1
AI Rev 2.2 November 2001
Advanced Information
BOSR=1
SR0
(384fs)
1
1
1
1
16.9344MHz/384 x 2/11
16.9344MHz /384 x 2
MCLK=16.9344
16.9344MHz /384
not available
not available
not available
DIGITAL
FILTER
TYPE
8.018
KHz
44.1
88.2
2
2
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