
x
82801AA and 82801AB
Datasheet
5.15.6 USB Interrupts ...............................................................................5-91
5.15.6.1 Transaction Based Interrupts .........................................5-91
5.15.6.2 Non-Transaction Based Interrupts .................................5-93
5.15.7 USB Power Management ..............................................................5-94
5.15.8 USB Legacy Keyboard Operation..................................................5-94
SMBus Controller Functional Description (D31:F3)....................................5-97
5.16.1 Host Controller...............................................................................5-97
5.16.1.1 Command Protocols.......................................................5-97
5.16.1.2 I
2
C Behavior.................................................................5-104
5.16.2 Bus Arbitration .............................................................................5-105
5.16.3 Interrupts / SMI# ..........................................................................5-105
5.16.4 SMBALERT# ...............................................................................5-105
ICH AC’97 2.1 Functional Description ......................................................5-106
5.17.1 AC-link Overview .........................................................................5-108
5.17.2 AC-link Output Frame (SDOUT)..................................................5-110
5.17.3 AC-link Input Frame (SDIN).........................................................5-112
5.17.4 Register Access...........................................................................5-114
AC-Link Low Power Mode ........................................................................5-115
5.18.1 External Wake Event ...................................................................5-116
5.18.2 AC‘97 Cold Reset ........................................................................5-116
5.18.3 AC‘97 Warm Reset......................................................................5-116
5.18.4 System Reset ..............................................................................5-117
5.16
5.17
5.18
6
Register and Memory Mapping..................................................................................6-1
6.1
PCI Devices and Functions ..........................................................................6-2
6.1.1
PCI Configuration Map ....................................................................6-2
6.1.2
Standard PCI Bus Configuration Mechanism ..................................6-3
6.2
I/O Map.........................................................................................................6-4
6.2.1
Fixed I/O Address Ranges...............................................................6-4
6.2.2
Variable I/O Decode Ranges...........................................................6-6
6.3
Memory Map.................................................................................................6-7
7
Hub Interface-to-PCI Bridge Registers (D30:F0).......................................................7-1
7.1
PCI Configuration Registers (D30:F0)..........................................................7-1
7.1.1
VID—Vendor ID Register (HUB-PCI—D30:F0)...............................7-2
7.1.2
DID—Device ID Register (HUB-PCI—D30:F0)................................7-2
7.1.3
CMD—Command Register (HUB-PCI—D30:F0).............................7-3
7.1.4
PD_STS—Primary Device Status Register
(HUB-PCI—D30:F0)7-4
7.1.5
RID—Revision ID Register (HUB-PCI—D30:F0).............................7-5
7.1.6
SCC—Sub-Class Code Register (HUB-PCI—D30:F0)....................7-5
7.1.7
BCC—Base-Class Code Register (HUB-PCI—D30:F0)..................7-5
7.1.8
PMLT—Primary Master Latency Timer Register
(HUB-PCI—D30:F0) ........................................................................7-5
7.1.9
HEADTYP—Header Type Register (HUB-PCI—D30:F0)................7-6
7.1.10 PBUS_NUM—Primary Bus Number Register
(HUB-PCI—D30:F0)7-6
7.1.11 SBUS_NUM—Secondary Bus Number Register
(HUB-PCI—D30:F0) ........................................................................7-6
7.1.12 SUB_BUS_NUM—Subordinate Bus Number Register
(HUB-PCI—D30:F0) ........................................................................7-6