AD1981B Analog Devices, AD1981B Datasheet - Page 23

• Manufacturer Part Number: AD1981B
• Description: AD1981B AC'97 SoundMAX® Codec
• Manufacturer: Analog Devices

All register bits are read/write except for JS0ST and JS1ST, which are read only. All registers not shown and bits containing an X are assumed to be reserved.
JS0INT
JS1INT
JS0ST
JS1ST
JS0MD
JS1MD
JS0TMR
JS1TMR
JS0EQB
JS1EQB
JSMT[2,0]
REV. A
Reg
No. Name
72h Jack Sense
Indicates Pin JS0 Has Generated an Interrupt. Remains set until the software services JS0 interrupt, i.e., JS0 ISR
should clear this bit by writing a “0” to it. Note that the interrupt to the system is actually an OR combination of
this bit and JS1INT. Also note that the actual interrupt implementation is selected by the INTS bit (Register 76h).
It is also possible to generate a software system interrupt by writing a “1” to this bit.
Indicates Pin JS1 Has Generated an Interrupt. Remains set until the software services JS1 interrupt, i.e., JS1 ISR
should clear this bit by writing a “0” to it. See JS0INT description for additional details.
JS0 State. This bit always reports the logic state of JS0 pin.
JS1 State. This bit always reports the logic state of JS1 pin.
JS0 Mode. This bit selects the operation mode for the JS0 pin.
0 = Jack Sense mode (default).
1 = Interrupt mode.
JS1 Mode. This bit selects the operation mode for the JS1 pin.
0 = Jack Sense mode (default).
1 = Interrupt mode.
JS0 Timer Enable. If this bit is set to a “1,” JS0 must be high for greater than 278 ms to be recognized.
JS1 Timer Enable. If this bit is set to a “1,” JS1 must be high for greater than 278 ms to be recognized.
JS0 EQ Bypass Enable. This bit enables JS0 to control the EQ bypass. When this bit is set to “1,” JS0 = 1 will
cause the EQ to be bypassed.
JS1 EQ Bypass Enable. This bit enables JS1 to control the EQ bypass. When this bit is set to “1,” JS1 = 1 will
cause the EQ to be bypassed.
JS Mute Enable Selector. These three bits select and enable the Jack Sense muting action (see Table VIII).
D15 D14
X
X
D13 D12
X
JS
MT2
Jack Sense/Audio Interrupt/Status Register (Index 72h)
D11
JS
MT1
MT0
D10
JS
D9
JS1
EQB
D8
JS0
EQB
–23–
D7
JS1
TMR
D6
JS0
TMR
D5
JS1
MD
D4
JS0
MD
D3
JS1
ST
ST
D2
JS0
D1
JS1
INT
AD1981B
D0
JS0
INT
Default
0000h