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Programmer’s Reference Manual 61
Intel
®
High Definition Audio Controller Registers (D27:F0)
1.2.42 SDFMT—Stream Descriptor Format Register
(Intel
®
High Definition Audio Controller—D27:F0)
Memory Address: Input Stream[0]: HDBAR + 92h Attribute: R/W
Input Stream[1]: HDBAR + B2h
Input Stream[2]: HDBAR + D2h
Input Stream[3]: HDBAR + F2h
Output Stream[0]: HDBAR + 112h
Output Stream[1]: HDBAR + 132h
Output Stream[2]: HDBAR + 152h
Output Stream[3]: HDBAR + 172h
Default Value: 0000h Size: 16 bits
Bit Description
15 Reserved.
14
Sample Base Rate — R/W
0 = 48 kHz
1 = 44.1 kHz
13:11
Sample Base Rate Multiple — R/W
000 = 48 kHz, 44.1 kHz or less
001 = x2 (96 kHz, 88.2 kHz, 32 kHz)
010 = x3 (144 kHz)
011 = x4 (192 kHz, 176.4 kHz)
Others = Reserved.
10:8
Sample Base Rate Devisor — R/W.
000 = Divide by 1(48 kHz, 44.1 kHz)
001 = Divide by 2 (24 kHz, 22.05 kHz)
010 = Divide by 3 (16 kHz, 32 kHz)
011 = Divide by 4 (11.025 kHz)
100 = Divide by 5 (9.6 kHz)
101 = Divide by 6 (8 kHz)
110 = Divide by 7
111 = Divide by 8 (6 kHz)
7 Reserved.
6:4
Bits per Sample (BITS) — R/W.
000 = 8 bits. The data will be packed in memory in 8-bit containers on 16-bit boundaries
001 = 16 bits. The data will be packed in memory in 16-bit containers on 16-bit boundaries
010 = 20 bits. The data will be packed in memory in 32-bit containers on 32-bit boundaries
011 = 24 bits. The data will be packed in memory in 32-bit containers on 32-bit boundaries
100 = 32 bits. The data will be packed in memory in 32-bit containers on 32-bit boundaries
Others = Reserved.
3:0
Number of Channels (CHAN) — R/W. Indicates number of channels in each frame of the stream.
0000 =1
0001 =2
........
1111 =16