Daa Interface - Intel 536EPXX - PRELIMINARY Datasheet

536EPXX — Host Accelerated Modem 56K V.92 Chipset
Table 16. PCI Subsystem Vendor ID and Subsystem ID with No EEPROM (Continued)
8.2

DAA Interface

A DAA (Data Access Arrangement) is the interface between the modem chipset and the telephone
network. The DAA interface controls the telephone line off-hook relays, detects ring signals, and
transmits and receives analog signals.
8.3 ACPI Interface
The 536EPXX supports the ACPI (Advanced Configuration and Power Interface) power
management specification: the operating system puts system components into low-power states
when not active. These chipsets support three power states: D0, D2, and D3
8.3.1 D0
All PCI bus functions must support the D0 state and go to D0 before use. On power up, the
function is in an uninitialized state. When initialized by system software, the function goes to D0
active.
8.3.2 D2
D2 may be entered when a PCI bus function is idle. This provides significant power savings and
allows the function to return to the original condition. In this state only PCI configuration access is
allowed. Memory and I/O access is not allowed. Configuration space must be accessible by system
software while D2 is active.
System software must restore the function to D0 active before memory or I/O space can be
accessed. Initiated activity such as bus mastering and functional interrupt request generation occur
only after the function has been restored to active state.
28
GPIO[10:8]
001
010
011
100
101
110
111
Intel Confidential
Subsystem Vendor
Intel (ID = 8086)
Intel (ID = 8086)
Intel (ID = 8086)
Intel (ID = 8086)
Intel (ID = 8086)
Intel (ID = 8086)
Intel (ID = 8086)
Subsystem ID
1001h
1002h
1003h
1004h
1005h
1006h
1007h
.
cold
PreliminaryDatasheet