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©2008 Advanced Micro Devices, Inc.
HD Audio Controllers Registers
AMD SB600 Register Reference Manual Proprietary Page 247
Stream Descriptor FIFO Size – R – 16 bits
Input Stream 0 - [Mem_Reg: Base + 90h]
Input Stream 1 - [Mem_Reg: Base + B0h]
Input Stream 2 - [Mem_Reg: Base + D0h]
Input Stream 3 - [Mem_Reg: Base + F0h]
Output Stream 0 - [Mem_Reg: Base + 110h]
Output Stream 1 - [Mem_Reg: Base + 130h]
Output Stream 2 - [Mem_Reg: Base + 150h]
Output Stream 3 - [Mem_Reg: Base + 170h]
Field Name Bits Default Description
FIFO Size 15:0 0000h For Output Stream, the FIFO Size varies between 32
dwords to 256 dwords depending on the Stream Format.
For Input Stream, the FIFO Size is fixed at 64 dwords.
Stream Descriptor Format – RW – 16 bits
Input Stream 0 - [Mem_Reg: Base + 92h]
Input Stream 1 - [Mem_Reg: Base + B2h]
Input Stream 2 - [Mem_Reg: Base + D2h]
Input Stream 3 - [Mem_Reg: Base + F2h]
Output Stream 0 - [Mem_Reg: Base + 112h]
Output Stream 1 - [Mem_Reg: Base + 132h]
Output Stream 2 - [Mem_Reg: Base + 152h]
Output Stream 3 - [Mem_Reg: Base + 172h]
Field Name Bits Default Description
Number of Channels 3:0 0h Number of channels in each frame of the stream.
0000b = 1
0001b = 2
:
1111b = 16
Bits per Sample 6:4 0h 000b = 8 bits
001b = 16 bits
010b = 20 bits
011b = 24 bits
100b = 32 bits
101b – 111b = Reserved
Reserved 7 0b Reserved. Software must do a read-modify-write to
preserve the value of these bits.
Sample Base Rate Divisor 10:8 0h 000b = Divide by 1 (48 kHz, 44.1 kHz)
001b = Divide by 2 (24 kHz, 22.05 kHz)
010b = Divide by 3 (16 kHz, 32 kHz)
011b = Divide by 4 (11.025 kHz)
10b0 = Divide by 5 (9.6 kHz)
101b = Divide by 6 (8 kHz)
110b = Divide by 7
111b = Divide by 8 (6 kHz)
Sample Base Rate
Multiple
13:11 0h 000b = 1 (48 kHz, 44.1 kHz)
001b = 2 (96 kHz, 88.2 kHz, 32 kHz)
010b = 3 (144 kHz)
011b = 4 (192 kHz, 176.4 kHz)
101b – 111b = Reserved
Sample Base Rate 14 0b 0 = 48 kHz
1 = 44.1 kHz
Reserved 15 0b Reserved