CS4298 Datasheet, PDF (31/52 Pages) Cirrus Logic – SoundFusion Audio/Modem Codec 97 (AMC 97)

CS4298
6.1.22 Extended Modem ID (Index 3Eh)
Mode
0
1
2
3
D15
PRH
PRH
D14
PRG
PRG
D13
PRF
D12
PRE
D11
PRD
PRD
PRD
D10
PRC
PRC
PRC
PRC
D9
PRB
PRB
PRB
PRB
D8
PRA
PRA
PRA
PRA
D7
HDAC
HDAC
D6
HADC
HADC
D5
DAC2
D4
ADC2
D3
DAC1
DAC1
DAC1
D2
ADC1
ADC1
ADC1
ADC1
D1
MREF
MREF
MREF
MREF
D0
GPIO
GPIO
GPIO
GPIO
PRH
PRG
PRF
PRE
PRD
PRC
PRB
PRA
HDAC
HADC
DAC2
ADC2
DAC1
ADC1
MREF
GPIO
Handset DAC. When set powers down the Handset DAC.
Handset ADC. When set powers down the Handset ADC.
Line 2 DAC. When set powers down the Line 2 DAC.
Line 2 ADC. When set powers down the Line 2 ADC.
Line 1 DAC. When set powers down the Line 1 DAC.
Line 1 ADC. When set powers down the Line 1 ADC.
Modem Reference. When set powers down the modem reference. The modem and audio share a com-
mon reference. The reference will not power down unless PR3 of the Power Down Ctrl/Stat (Index 26h)
register is also set.
GPIO. When set the GPIO pins are tri-state and powered down. Slot 12 is marked invalid if the AC-link
is active.
Handset DAC. When set indicates the Handset DAC is ready.
Handset ADC. When set indicates the Handset ADC is ready.
Line 2 DAC. When set indicates the Line 2 DAC is ready.
Line 2 ADC. When set indicates the Line 2 ADC is ready.
Line 1 DAC. When set indicates the Line 1 DAC is ready.
Line 1 ADC. When set indicates the Line 1 ADC is ready.
Modem Reference. When set indicates the modem reference is ready.
GPIO. When set the GPIO pins are ready. Slot 12 is marked valid.
Default
Mode 0 x0CFh
Mode 1 x03Fh
Mode 2 x08Fh
Mode 3 x047h Where x is determined by the state of ID[1:0] input pins.
PR[A:H] are read/write bits that provide power management of the modem AFE subsection. All re-
maining bits are read/only status indicating modem subsystems are ready for operation. After reset
or issuing a change to the MD[1:0] of AC Mode (Index 5Eh) register, the respective status bits for
that mode will be clear until the subsystem becomes ready.
6.1.23 Line 1 DAC/ADC Rate (Index 40h)
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] Line 1 DAC/ADC Sample Rate.
Default Read-only value BB80h, indicating 48 kHz sample rate.
6.1.24 Line 2 DAC/ADC Rate (Index 42h)
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] Line 2 DAC/ADC Sample Rate.
Default Read-only value BB80h, indicating 48 kHz sample rate.
DS315PP2
31