PC87372 datasheet(9/144 Pages) NSC

9 / 144 page

Table of Contents (Continued)

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Revision 1.2

9.0

Legacy Functional Blocks

9.1

FLOPPY DISK CONTROLLER (FDC) ..................................................................................... 110

9.1.1

General Description ................................................................................................... 110

9.1.2

FDC Bitmap Summary ............................................................................................... 111

9.2

PARALLEL PORT .................................................................................................................... 112

9.2.1

General Description ................................................................................................... 112

9.2.2

Parallel Port Register Map ......................................................................................... 112

9.2.3

Parallel Port Bitmap Summary .................................................................................. 113

9.3

UART FUNCTIONALITY (SERIAL PORT) .............................................................................. 115

9.3.1

General Description ................................................................................................... 115

9.3.2

UART Register Bank Overview ................................................................................. 115

9.3.3

SP Register Maps ..................................................................................................... 115

9.3.4

SP Bitmap Summary ................................................................................................ 117

9.4

KEYBOARD AND MOUSE CONTROLLER (KBC) .................................................................. 119

9.4.1

General Description ................................................................................................... 119

9.4.2

KBC Register Map ..................................................................................................... 120

9.4.3

KBC Bitmap Summary ............................................................................................... 120

10.0

Device Characteristics

10.1

GENERAL DC ELECTRICAL CHARACTERISTICS ............................................................... 121

10.1.1

Recommended Operating Conditions ....................................................................... 121

10.1.2

Absolute Maximum Ratings ....................................................................................... 121

10.1.3

Capacitance .............................................................................................................. 121

10.1.4

Power Consumption under Recommended Operating Conditions ............................ 122

10.1.5

Voltage Thresholds .................................................................................................... 122

10.2

DC CHARACTERISTICS OF PINS, BY I/O BUFFER TYPES ................................................ 123

10.2.1

Input, TTL Compatible ............................................................................................... 123

10.2.2

Input, TTL Compatible, with Schmitt Trigger ............................................................. 123

10.2.3

Input, TTL Compatible, with 400 mV Schmitt Trigger ................................................ 123

10.2.4

Input, PCI 3.3V Compatible ....................................................................................... 124

10.2.5

Analog Input .............................................................................................................. 124

10.2.6

Output, TTL/CMOS Compatible, Push-Pull Buffer .................................................... 124

10.2.7

Output, TTL/CMOS Compatible, Open-Drain Buffer ................................................. 124

10.2.8

Output, PCI 3.3V Compatible .................................................................................... 125

10.2.9

Analog Output ............................................................................................................ 125

10.2.10 Input/Output Switch, SMBus Compatible .................................................................. 125

10.2.11 Exceptions ................................................................................................................. 125

10.2.12 Terminology ............................................................................................................... 126

10.3

INTERNAL RESISTORS ......................................................................................................... 127

10.3.1

Pull-Up Resistor ......................................................................................................... 127

10.3.2

Pull-Down Resistor .................................................................................................... 127

10.4

AC ELECTRICAL CHARACTERISTICS .................................................................................. 128

10.4.1

AC Test Conditions .................................................................................................... 128

10.4.2

Reset Timing ............................................................................................................. 129

10.4.3

Clock Timing .............................................................................................................. 131

PC87372 Datasheet(PDF) 9 Page - National Semiconductor (TI)

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