CS4298 Datasheet, PDF (30/52 Pages) Cirrus Logic – SoundFusion Audio/Modem Codec 97 (AMC 97)

CS4298
6.1.19 Center LFE Volume (Index 36h)
D15 D14 D13 D12 D11 D10 D9
D8
D7
Mute
LFE5 LFE4 LFE3 LFE2 LFE1 LFE0 Mute
D6
D5
D4
D3
D2
D1
D0
CNT5 CNT4 CNT3 CNT2 CNT1 CNT0
LFE[5:0]
CNT[5:0]
Default
LFE Volume. Least significant bit represents -1.5 dB with 00000 = 0 dB. The total range is 0 dB to -
94.5 dB.
Center Volume.Least significant bit represents -1.5 dB with 00000 = 0 dB. The total range is 0 dB to -
94.5 dB.
8080h, indicating mute with 0 dB attenuation.
LFE[5:0]/LSR[5:0]
CNT[5:0]/RSR[5:0]
Write
000000
000001
…
111111
LFE[5:0]/LSR[5:0]
CNT[5:0]/RSR[5:0]
Read
000000
000001
…
111111
Gain Level
0 dB
-1.5 dB
...
-94.5 dB
Table 6. 6 Channel Volume Attenuation
6.1.20 LR Surround Volume (Index 38h)
D15 D14 D13 D12 D11 D10 D9
D8
D7
Mute
LSR5 LSR4 LSR3 LSR2 LSR1 LSR0 Mute
D6
D5
D4
D3
D2
D1
D0
RSR5 RSR4 RSR3 RSR2 RSR1 RSR0
LSR[5:0]
RSR[5:0]
Default
Left Surround Volume. Least significant bit represents -1.5 dB with 00000 = 0 dB. The total range is 0
dB to -94.5 dB.
Right Surround Volume. Least significant bit represents -1.5 dB with 00000 = 0 dB. The total range is 0
dB to -94.5 dB.
8080h, indicating 0 dB attenuation.
6.1.21 Extended Modem ID (Index 3Ch)
Mode D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
0 ID1
ID0
HSET
LIN1
1 ID1
ID0
LIN2
2 ID1
ID0
LIN1
3 ID1
ID0
HSET
Handset. Indicates handset ADC/DAC is supported.
LIN1
Line 1. When set, indicates 1st line is supported.
LIN2
Line 2. When set, indicates 2nd line is supported.
ID[1:0]
Codec configuration ID. Primary is 00; Secondary is 01,10,or 11. This is a reflection of the configuration
pins. The state of the ID# pins are determined at power-up and are the inverse of the ID bits in this reg-
ister.
Default
Mode 0
Mode 1
Mode 2
x005h
x003h
x001h
Mode 3 x000h Where x is determined by the state of ID[1:0] input pins.
The Extended Modem ID is a read/write register that identifies the Codec’s modem capabilities. This
register reports the features available based on the basic operating mode determined by MD[1:0] of
AC Mode (Index 5Eh) register. Writing any value to this location issues a reset to the modem regis-
ters (Index 3Ch-56h). Audio registers are not reset by a write to this location.
NOTE: All GPIO registers (Index 46h-54h) are reset by any write to this location.
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DS315PP2