AMD Geode SC1201 - Manual (Page 263)

AMD Geode™ SC1200/SC1201 Processor Data Book 263
Core Logic Module - Audio Registers - Function 3 32579B
6.4.4.1 Audio 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 6-38 gives 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
31 Codec GPIO Interface.
0: Disable.
1: Enable.
30 Codec 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.
20 Codec 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].
23 Codec 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].
22 SYNC Pin. Sets SYNC high or low.
0: Low.
1: High.
21 SDATA_IN2_EN. When enabled, allows use of SDATA_IN2 input.
0: Disable.
1: Enable.
20 Audio Bus Master 5 AC97 Slot Select. Selects slot for Audio Bus Master 5 to receive data.
0: Slot 6.
1: Slot 11.
19 Audio 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.
17 Status 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.