Enhanced Super I/O Controller with Fast IR
Datasheet
17.1.5
CPU-to-Host Communication ........................................................................................................113
17.1.6
Host-to-CPU Communication ........................................................................................................113
17.1.7
KIRQ..............................................................................................................................................114
17.1.8
MIRQ .............................................................................................................................................114
17.1.9
Gate A20 .......................................................................................................................................114
17.2
External Keyboard and Mouse Interface...............................................................................................114
17.3
Keyboard Power Management .............................................................................................................114
17.3.1
Soft Power Down Mode.................................................................................................................114
17.3.2
Hard Power Down Mode ...............................................................................................................115
17.4
Interrupts ..............................................................................................................................................115
17.5
Memory Configurations.........................................................................................................................115
17.5.1
Register Definitions .......................................................................................................................115
17.5.2
Status Register ..............................................................................................................................115
17.6
External Clock Signal............................................................................................................................116
17.7
Default Reset Conditions ......................................................................................................................116
17.8
GATEA20 and Keyboard Reset ............................................................................................................116
17.9
Port 92 Fast GATEA20 and Keyboard Reset .......................................................................................117
17.9.1
Port 92 Register.............................................................................................................................117
17.9.2
8042 P12 and P16 Functions ........................................................................................................118
Chapter 18
System Management Interrupt (SMI) ................................................................................. 120
18.1
Registers ..............................................................................................................................................120
18.1.1
SMI Enable Registers....................................................................................................................120
18.1.2
SMI Status Registers.....................................................................................................................120
Chapter 19
Configuration ...................................................................................................................... 121
19.1
System Elements..................................................................................................................................121
19.1.1
Primary Configuration Address Decoder .......................................................................................121
19.1.2
Entering the Configuration State....................................................................................................121
19.1.3
Exiting the Configuration State ......................................................................................................122
19.2
Configuration Sequence .......................................................................................................................122
19.2.1
Enter Configuration Mode..............................................................................................................122
19.2.2
Configuration Mode .......................................................................................................................122
19.2.3
Exit Configuration Mode ................................................................................................................122
19.2.4
Programming Example ..................................................................................................................123
19.2.5
Chip Level (Global) Control/Configuration Registers [0x00-0x2F] .................................................125
19.2.6
Logical Device Configuration/Control Registers [0x30-0xFF] ........................................................128
19.2.7
Note A. Logical Device IRQ and DMA Operation ..........................................................................132
19.2.8
SMSC Defined Logical Device Configuration Registers ................................................................132
Chapter 20
20.1
20.2
Operational Description...................................................................................................... 143
Maximum Guaranteed Ratings*............................................................................................................143
DC Electrical Characteristics ................................................................................................................143
Chapter 21
Chapter 22
Chapter 23
Timing Diagrams ................................................................................................................146
ECP Parallel Port Timing.................................................................................................... 164
Package Outlines ...............................................................................................................172
List of Figures
Figure 2.1 - FDC37C672 100 Pin QFP ........................................................................................................................10
Figure 2.2 - FDC37C672 100 Pin TQFP ......................................................................................................................11
Figure 4.1 - FDC37C672 Block Diagram......................................................................................................................16
Figure 11.1 - IR Interface Block Diagram .....................................................................................................................79
Figure 17.1 - Keyboard and Mouse Interface.............................................................................................................112
Figure 17.2 - Gate A20 Turn-On Sequence Timing....................................................................................................119
Figure 21.1 - IOW Timing for Port 92 .........................................................................................................................147
Figure 21.2 - Power-Up Timing ..................................................................................................................................147
Figure 21.3 - ISA Write...............................................................................................................................................148
Figure 21.4 - ISA Read ..............................................................................................................................................149
Figure 21.5 - Internal 8042 CPU Timing.....................................................................................................................150
Figure 21.6 - Input Clock Timing ................................................................................................................................151
SMSC FDC37C672
Page 6
Rev. 10-29-03
DATASHEET
SMSC [ SMSC CORPORATION ]
