AMD SB600 User Manual
Page 247
©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