W83977TF-A View Datasheet(PDF) - Winbond

Part Name

Description

Manufacturer

W83977TF-A

WINBOND I/O

Winbond 

W83977TF

5.3.5 CFIFO (PARALLEL PORT DATA FIFO) MODE = 010...........................................................58

5.3.6 ECPDFIFO (ECP DATA FIFO) MODE = 011............................................................................58

5.3.7 TFIFO (TEST FIFO MODE) MODE = 110 .................................................................................58

5.3.8 CNFGA (CONFIGURATION REGISTER A) MODE = 111 ....................................................58

5.3.9 CNFGB (CONFIGURATION REGISTER B) MODE = 111.....................................................58

5.3.10 ECR (EXTENDED CONTROL REGISTER) MODE = ALL....................................................59

5.3.11 BIT MAP OF ECP PORT REGISTERS .......................................................................................60

5.3.12 ECP PIN DESCRIPTIONS ............................................................................................................61

5.3.13 ECP OPERATION..........................................................................................................................62

5.3.14 FIFO OPERATION ........................................................................................................................62

5.3.15 DMA TRANSFERS........................................................................................................................63

5.3.16 PROGRAMMED I/O (NON-DMA) MODE................................................................................63

5.4 EXTENSION FDD MODE (EXTFDD)...................................................................................................63

5.5 EXTENSION 2FDD MODE (EXT2FDD) ..............................................................................................63

6. KEYBOARD CONTROLLER .............................................................................................64

6.1 OUTPUT BUFFER ....................................................................................................................................64

6.2 INPUT BUFFER .........................................................................................................................................64

6.3 STATUS REGISTER .................................................................................................................................65

6.4 COMMANDS .............................................................................................................................................65

6.5 HARDWARE GATEA20/KEYBOARD RESET CONTROL LOGIC .................................................67

6.5.1 KB CONTROL REGISTER (LOGIC DEVICE 5, CR-F0) .........................................................67

6.5.2 PORT 92 CONTROL REGISTER (DEFAULT VALUE = 0X24) ............................................67

6.4 ONNOW / SECURITY KEYBOARD AND MOUSE WAKE-UP ......................................................68

7. GENERAL PURPOSE I/O....................................................................................................69

7.1 BASIC I/O FUNCTIONS...........................................................................................................................71

7.2 ALTERNATE I/O FUNCTIONS ..............................................................................................................73

7.2.1 INTERRUPT STEERING..............................................................................................................73

7.2.2 WATCH DOG TIMER OUTPUT .................................................................................................74

7.2.3 POWER LED...................................................................................................................................74

7.2.4 GENERAL PURPOSE ADDRESS DECODER..........................................................................74

7.2.5 GENERAL PURPOSE WRITE STROBE....................................................................................74

8. PLUG AND PLAY CONFIGURATION ............................................................................ 75

8.1 COMPATIBLE PNP...................................................................................................................................75

8.1.1 EXTENDED FUNCTION REGISTERS......................................................................................75

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Publication Release Date: March 1998

Revision 0.62

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