PC87373 datasheet(11/174 Pages) NSC

11 / 174 page

Table of Contents (Continued)

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Revision 1.1

11.2.5

MIDI Signals Routing Control Logic ........................................................................... 132

11.2.6

Operation Modes ....................................................................................................... 132

11.2.7

MIDI Port Status Flags .............................................................................................. 133

11.2.8

MIDI Port Interrupts ................................................................................................... 134

11.2.9

Enhanced MIDI Port Features ................................................................................... 134

11.3

MIDI PORT REGISTERS ........................................................................................................ 136

11.3.1

MIDI Port Register Map ............................................................................................. 136

11.3.2

MIDI Data In Register (MDI) ...................................................................................... 136

11.3.3

MIDI Data Out Register (MDO) ................................................................................. 136

11.3.4

MIDI Status Register (MSTAT) .................................................................................. 137

11.3.5

MIDI Command Register (MCOM) ............................................................................ 138

11.3.6

MIDI Control Register (MCNTL) ................................................................................ 138

11.4

MIDI PORT BITMAP

.............................................................................................................. 139

12.0

Legacy Functional Blocks

12.1

FLOPPY DISK CONTROLLER (FDC) ..................................................................................... 140

12.1.1

General Description ................................................................................................... 140

12.1.2

FDC Bitmap Summary ............................................................................................... 141

12.2

PARALLEL PORT .................................................................................................................... 142

12.2.1

General Description ................................................................................................... 142

12.2.2

Parallel Port Register Map ......................................................................................... 142

12.2.3

Parallel Port Bitmap Summary .................................................................................. 143

12.3

UART FUNCTIONALITY (SERIAL PORT 1 AND SERIAL PORT 2) ....................................... 145

12.3.1

General Description ................................................................................................... 145

12.3.2

UART Register Bank Overview ................................................................................. 145

12.3.3

SP1 and SP2 Register Maps .................................................................................... 145

12.3.4

SP1 and SP2 Bitmap Summary ............................................................................... 147

12.4

KEYBOARD AND MOUSE CONTROLLER (KBC) .................................................................. 149

12.4.1

General Description ................................................................................................... 149

12.4.2

KBC Register Map ..................................................................................................... 150

12.4.3

KBC Bitmap Summary ............................................................................................... 150

13.0

Device Characteristics

13.1

GENERAL DC ELECTRICAL CHARACTERISTICS ............................................................... 151

13.1.1

Recommended Operating Conditions ....................................................................... 151

13.1.2

Absolute Maximum Ratings ....................................................................................... 151

13.1.3

Capacitance .............................................................................................................. 151

13.1.4

Power Consumption under Recommended Operating Conditions ............................ 152

13.1.5

Voltage Thresholds .................................................................................................... 152

13.2

DC CHARACTERISTICS OF PINS, BY I/O BUFFER TYPES ................................................ 153

13.2.1

Input, Game Port Compatible with Schmitt Trigger ................................................... 153

13.2.2

Input, TTL Compatible ............................................................................................... 153

13.2.3

Input, TTL Compatible, with Schmitt Trigger ............................................................. 153

13.2.4

Input, TTL Compatible, with 400 mV Schmitt Trigger ................................................ 154

13.2.5

Input, PCI 3.3V Compatible ....................................................................................... 154

13.2.6

Analog Input .............................................................................................................. 154

PC87373 Datasheet(PDF) 11 Page - National Semiconductor (TI)

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