
W83877ATF
Publication Release Date: July 1997
- I -
Version 0.50
TABLE OF CONTENTS
GENERAL DESCRIPTION ................................................................................................1
FEATURES ..........................................................................................................................2
1.0 PIN CONFIGURATION...............................................................................................4
1.0
1.1
1.2
1.3
1.4
PIN DESCRIPTION ........................................................................................................................5
HOST INTERFACE .........................................................................................................................5
SERIAL PORT INTERFACE ...........................................................................................................7
MULTI-MODE PARALLEL PORT..................................................................................................9
FDC INTERFACE..........................................................................................................................14
2.0 FDC FUNCTIONAL DESCRIPTION........................................................................16
2.1
2.2
W83877ATF FDC...........................................................................................................................16
REGISTER DESCRIPTIONS .........................................................................................................28
3.0 UART PORT................................................................................................................39
3.1
3.2
3.3
UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER (UART A, UART B)..................39
REGISTER ADDRESS...................................................................................................................40
INFRARED PORT .........................................................................................................................49
4.0 PARALLEL PORT.....................................................................................................82
4.1
4.2
4.3
4.4
4.5
PRINTER INTERFACE LOGIC.....................................................................................................82
ENHANCED PARALLEL PORT (EPP) .........................................................................................84
EXTENDED CAPABILITIES PARALLEL (ECP) PORT...............................................................88
EXTENSION FDD MODE (EXTFDD)...........................................................................................97
EXTENSION 2FDD MODE (EXT2FDD).......................................................................................97
5.0 PLUG AND PLAY CONFIGURATION....................................................................98
6.0 ACPI /LEGACY FEATURE AND AUTO POWER MANAGEMENT.....................98
6.1
6.2
ACPI/LEGACY POWER MANAGEMENT ...................................................................................98
DEVICE(AUTO) POWER MANAGEMENT..................................................................................98
7.0 SERIAL IRQ.................................................................................................................99