FW82801EB Intel, FW82801EB Datasheet - Page 578

• Manufacturer Part Number: FW82801EB
• Manufacturer: Intel

Specifications of FW82801EB

• Lead Free Status / RoHS Status: Not Compliant

AC ’97 Modem Controller Registers (D31:F6)
16.2.10
578
Note: On reads from a codec, the controller will give the codec a maximum of four frames to respond,
Note: Reads across DWord boundaries are not supported.
Note: Reads across DWord boundaries are not supported.
after which if no response is received, it will return a dummy read completion to the processor
(with all F’s on the data) and also set the Read Completion Status bit in the GSR.
CAS—Codec Access Semaphore Register
(Modem—D31:F6)
I/O Address:
Default Value:
Lockable:
Bit
7:1
0
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
an I/O access. Once the access is completed, hardware automatically clears this bit.
NABMBAR + 44h
00h
No
Description
Intel
Attribute:
Size:
Power Well:
®
82801EB ICH5 / 82801ER ICH5R Datasheet
R/W (special)
8 bits
Core