AMD SC2200 manual 38. F3BAR0+Memory Offset Audio Configuration Registers, Audio Support Registers

Core Logic Module - Audio Registers - Function 3 32580B

6.4.4.1Audio Support Registers

F3 Index 10h, Base Address Register 0 (F3BAR0), points to the base address of where the registers for audio sup- port are located. Table 6-38gives the bit formats of the

memory mapped audio configuration registers that are accessed through F3BAR0.

Table 6-38. F3BAR0+Memory Offset: Audio Configuration Registers

Bit	Description
Offset 00h-03h		Codec GPIO Status Register (R/W)	Reset Value: 00000000h

31Codec GPIO Interface.

0:Disable.

1:Enable.

30Codec GPIO SMI. When asserted, allows codec GPIO interrupt to generate an SMI.

0:Disable.

1:Enable.

	Top level SMI status is reported at F1BAR0+I/O Offset 00h/02h[1].
	Second level SMI status is reported at F3BAR0+Memory Offset 10h/12h[1].
29:21	Reserved. Must be set to 0.

20Codec GPIO Status Valid. (Read Only) Indicates if the status read is valid.

0:Yes.

1:No.

19:0	Codec GPIO Pin Status. (Read Only) This field indicates the GPIO pin status that is received from the codec in slot 12 on
	the SDATA_IN signal.
Offset 04h-07h		Codec GPIO Control Register (R/W)	Reset Value: 00000000h
31:20	Reserved. Must be set to 0.
19:0	Codec GPIO Pin Data. This field indicates the GPIO pin data that is sent to the codec in slot 12 on the SDATA_OUT signal.
Offset 08h-0Bh		Codec Status Register (R/W)	Reset Value: 00000000h
31:24	Codec Status Address. (Read Only) Address of the register for which status is being returned. This address comes from
	slot 1 bits [19:12].

23Codec Serial INT Enable. When asserted, allows codec serial interrupt to cause an SMI.

0:Disable.

1:Enable.

Top level SMI status is reported at F1BAR0+I/O Offset 00h/02h[1].

Second level SMI status is reported at F3BAR0+Memory Offset 10h/12h[1].

22SYNC Pin. Sets SYNC high or low.

0:Low.

1:High.

21SDATA_IN2_EN. When enabled, allows use of SDATA_IN2 input.

0:Disable.

1:Enable.

20Audio Bus Master 5 AC97 Slot Select. Selects slot for Audio Bus Master 5 to receive data.

0:Slot 6.

1:Slot 11.

19Audio Bus Master 4 AC97 Slot Select. Selects slot for Audio Bus Master 4 to transmit data.

0:Slot 6.

1:Slot 11.

18 Reserved. Must be set to 0.

17Status Tag. (Read Only) The codec status data in bits [15:0] of this register is updated in the current AC97 frame. (codec ready, slot1 and slot2 bits in tag slot are all set in current AC97 frame).

0:Not new.

1:New, updated in current frame.

AMD Geode™ SC2200 Processor Data Book 273