FW82801EB Intel, FW82801EB Datasheet - Page 558
FW82801EB
Manufacturer Part Number
FW82801EB
Description
Manufacturer
Intel
Datasheet
1.FW82801EB.pdf
(671 pages)
Specifications of FW82801EB
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AC ’97 Audio Controller Registers (D31:F5)
15.2.10
15.2.11
558
CAS—Codec Access Semaphore Register
(Audio—D31:F5)
I/O Address:
Default Value:
Lockable:
NOTE: Reads across DWord boundaries are not supported.
SDM—SDATA_IN Map Register
(Audio—D31:F5)
I/O Address:
Default Value:
Lockable:
NOTE: Reads across DWord boundaries are not supported.
Bit
7:1
Bit
7:6
5:4
1:0
0
3
2
Reserved.
Codec Access Semaphore (CAS) — R/W (special). This bit is read by software to check whether a
codec access is currently in progress.
0 = No access in progress.
1 = The act of reading this register sets this bit to 1. The driver that read this bit can then perform
PCM In 2, Microphone In 2 Data In Line (DI2L) — R/W. When the SE bit is set, these bits indicates
which AC_SDIN line should be used by the hardware for decoding the input slots for PCM In 2 and
Microphone In 2. When the SE bit is cleared, the value of these bits are irrelevant, and PCM In 2
and Mic In 2 DMA engines are not available.
00 = AC_SDIN0
01 = AC_SDIN1
10 = AC_SDIN2
11 = Reserved
PCM In 1, Microphone In 1 Data In Line (DI1L) — R/W. When the SE bit is set, these bits indicates
which AC_SDIN line should be used by the hardware for decoding the input slots for PCM In 1 and
Microphone In 1. When the SE bit is cleared, the value of these bits are irrelevant, and the PCM In 1
and Mic In 1 engines use the OR’d AC_SDIN lines.
00 = AC_SDIN0
01 = AC_SDIN1
10 = AC_SDIN2
11 = Reserved
Steer Enable (SE) — R/W. When set, the AC_SDIN lines are treated separately and not OR’d
together before being sent to the DMA engines. When cleared, the AC_SDIN lines are OR’d
together, and the “Microphone In 2” and “PCM In 2” DMA engines are not available.
Reserved — RO.
Last Codec Read Data Input (LDI) — RO. When a codec register is read, this indicates which
AC_SDIN the read data returned on. Software can use this to determine how the codecs are
mapped. The values are:
00 = AC_SDIN0
01 = AC_SDIN1
10 = AC_SDIN2
11 = Reserved
an I/O access. Once the access is completed, hardware automatically clears this bit.
NABMBAR + 34h
00h
No
NABMBAR + 80h
00h
No
Description
Description
Intel
Attribute:
Size:
Power Well:
Attribute:
Size:
Power Well:
®
82801EB ICH5 / 82801ER ICH5R Datasheet
R/W (special)
8 bits
Core
R/W, RO
8 bits
Core
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