
SMSC DS – SLC90E66
Page 5
Rev. 07/10/2002
TABLE OF CONTENTS
1.0
FUNCTIONAL OVERVIEW..............................................................................................................................13
2.0
SIGNAL DESCRIPTION..................................................................................................................................16
2.1
S
IGNALS
........................................................................................................................................................17
2.1.1
PCI Bus Interface.................................................................................................................................17
2.1.2
ISA/EIO Interface Signals.....................................................................................................................19
2.1.3
Xbus Interface Signals ........................................................................................................................22
2.1.4
DMA Signals ........................................................................................................................................23
2.1.5
Interrupt Controller and APIC Signals ..................................................................................................24
2.1.6
CPU Interface Signals..........................................................................................................................25
2.1.7
Clocks ..................................................................................................................................................27
2.1.8
IDE Signals ..........................................................................................................................................28
2.1.9
Universal Serial Bus Signals ................................................................................................................32
2.1.10
Power Management Signals ................................................................................................................32
2.1.11
General Purpose Input and Output Signals..........................................................................................35
2.1.12
Other System and Test Signals............................................................................................................37
2.1.13
Power and Ground Pins.......................................................................................................................37
2.2
P
OWER
P
LANES
..............................................................................................................................................38
2.2.1
Power Sequencing Requirements........................................................................................................38
3.0
REGISTER SUMMARY ...................................................................................................................................39
3.1
PCI/ISA
B
RIDGE
R
EGISTER
M
APPING
...............................................................................................................39
3.1.1
PCI Configuration Registers (Function 0).............................................................................................39
3.1.2
IO Space Registers (Function 0)..........................................................................................................40
3.2
IDE
C
ONTROLLER
R
EGISTER
M
APPING
T
ABLE
(F
UNCTION
1)..............................................................................43
3.2.1
PCI Configuration Registers (Function 1).............................................................................................43
3.2.2
IO Space Registers..............................................................................................................................44
3.3
U
NIVERSAL
S
ERIAL
B
US
(USB)
C
ONTROLLER
R
EGISTER
M
APPING
T
ABLE
(F
UNCTION
2).......................................44
3.3.1
PCI Configuration Registers (Function 2).............................................................................................44
3.3.2
SB OpenHCI Memory Mapped Registers (Function 2).........................................................................45
3.4
P
OWER
M
ANAGEMENT
R
EGISTER
M
APPING
T
ABLE
(F
UNCTION
3)........................................................................45
3.4.1
PCI Configuration Registers (Function 3).............................................................................................45
3.4.2
Power Management IO Space Registers (Function 3).........................................................................46
3.4.3
SMBus Controller IO Space Registers (Function 3).............................................................................47
4.0
PCI/ISA BRIDGE PCI REGISTER DESCRIPTION (FUNCTION 0).................................................................48
4.1
PCI/ISA
B
RIDGE
PCI
C
ONFIGURATION
S
PACE
R
EGISTERS
(PCI
F
UNCTION
0) .....................................................48
4.1.1
VID - Vendor Identification Register (Function 0).................................................................................48
4.1.2
DID - Device Identification Register (Function 0)..................................................................................48
4.1.3
PCICMD - PCI Command Register (Function 0)..................................................................................48
4.1.4
PCISTS - PCI Device Status Register (Function 0)..............................................................................49
4.1.5
RID - Revision ID Register (Function 0) ...............................................................................................49
4.1.6
CLASSCODE - Class Code Register (Function 0)...............................................................................50
4.1.7
HEDT - Header Type Register (Function 0) .........................................................................................50
4.1.8
IORT - ISA I/O Recovery Timer Register (Function 0) .........................................................................50
4.1.9
XBCS - X-Bus Chip Select Register (Function 0).................................................................................51
4.1.10
nPIRQRC[A:D] - nPIRQx Route Control Registers (Function 0) ..........................................................53
4.1.11
SERIRQC - Serial IRQ Control Register (Function 0) ..........................................................................54
4.1.12
FDMA - Type-F DMA Control Register (Function 0).............................................................................54
4.1.13
IRQ8SR - IRQ8 Source Register (Function 0)......................................................................................55
4.1.14
TOM - Top of Memory Register (Function 0)........................................................................................55
4.1.15
MBDMA [1:0] - Motherboard Device DMA Control Registers (Function 0)...........................................56
4.1.16
APICBASE - APIC Base Address Relocation Register (Function 0) ....................................................56
4.1.17
DLC - Deterministic Latency Control Register (Function 0)..................................................................57
4.1.18
PDMACFG - PCI DMA Configuration Register (Function 0).................................................................57
4.1.19
DDMABP - Distributed DMA Slave Base Pointer Registers (Function 0).............................................59
4.1.20
GENCFG - General Configuration Register (Function 0) .....................................................................59
4.1.21
RTCCFG - Real Time Clock Configuration Register (Function 0) ........................................................62
4.1.22
RTCPBAL - RTC Index Primary Base Address Low Byte (Function 0) ................................................63
4.1.23
RTCPBAH - RTC Index Primary Base Address High Byte (Function 0)...............................................63
4.1.24
SBMISCL - South Bridge Miscellaneous Low Register (Function 0)....................................................64