CS4299-BQ Datasheet, PDF (29/52 Pages) Cirrus Logic – CrystalClear SoundFusion Audio Codec 97

CS4299-BQ
4.16 PCM Front DAC Rate Register (Index 2Ch)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
SR15 SR14 SR13 SR12 SR11 SR10 SR9 SR8 SR7 SR6 SR5 SR4 SR3 SR2 SR1 SR0
SR[15:0]
Default
Front DAC Sample Rate. The SR[15:0] bits can only be written when the VRA bit of the Extend-
ed Audio Status/Control Register (Index 2Ah) is ‘set’. If the VRA bit is ‘clear’, all writes are ig-
nored and the register reads back BB80h; corresponding to a 48 kHz sample rate. If the VRA
bit is ‘set’, seven standard sample rates are available. If a sample rate written to the register is
not directly supported, the attempted value to be written will be decoded according to the ranges
indicated in Table 7. All register read transactions will reflect the actual value stored (column 2
in Table 7) and not the one attempted to be written.
BB80h. This value corresponds to 48 kHz sample rate..
4.17
Sample rate
(Hz)
8,000
11,025
16,000
22,050
32,000
44,100
48,000
SR[15:0]
1F40
2B11
3E80
5622
7D00
AC44
BB80
SR[15:12]
Decode Range
0 or 1
2
3
4 or 5
6 or 7
8, 9, or Ah
Bh, Ch, Dh, Eh, or Fh
Table 7. Standard Sample Rates
PCM L/R ADC Rate Register (Index 32h)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
SR15 SR14 SR13 SR12 SR11 SR10 SR9 SR8 SR7 SR6 SR5 SR4 SR3 SR2 SR1 SR0
SR[15:0]
Default
Left/Right ADC Sample Rate. The SR[15:0] bits can only be written when the VRA bit of the
Extended Audio Status/Control Register (Index 2Ah) is ‘set’. If the VRA bit is ‘clear’, all writes
are ignored and the register reads back BB80h; corresponding to a 48 kHz sample rate. If the
VRA bit is ‘set’, seven standard sample rates are available. If a sample rate written to the reg-
ister is not directly supported, the attempted value to be written will be decoded according to
the ranges indicated in Table 7. All register read transactions will reflect the actual value stored
(column 2 in Table 7) and not the one attempted to be written.
BB80h. This value corresponds to 48 kHz sample rate.
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