CS4297A
CS4297A
4.14 Extended Audio ID Register (Index 28h)
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
ID1
ID0
0
0
0
0
AMAP
0
0
0
0
0
0
0
0
VRA
ID[1:0]
AMAP
Codec Configuration ID. When ID[1:0] = 00, the CS4297A is the primary audio codec. When
ID[1:0] = 01, 10, or 11, the CS4297A is a secondary audio codec. The state of the ID[1:0] bits
is determined at power-up from the ID[1:0]# pins.
Audio Slot Mapping. The AMAP bit indicates whether the optional AC ’97 2.1 compliant AC-link
slot to audio DAC mapping is supported. This bit is a shadow of the AMAP bit in the AC Mode
Control Register (Index 5Eh). The PCM playback and capture slots are mapped according to
Table 7 on page 29.
VRA
Variable Rate PCM Audio. The VRA bit indicates whether variable rate PCM audio is supported.
This bit always returns ‘0’, indicating that variable rate PCM audio is not available.
Default
x200h. Where x is determined by the state of ID[1:0]# input pins. The Extended Audio ID Reg-
ister (Index 28h) is a read only register.
4.15 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 are read-only bits, and always read BB80h indicat-
ing 48 kHz sample rate.
BB80h. This value corresponds to 48 kHz sample rate.
4.16 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 are read-only bits, and always read BB80h in-
dicating 48 kHz sample rate.
BB80h. This value corresponds to 48 kHz sample rate.
28
28
DS318PP6
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