Western Digital 01 WD16C451 WD16C551 free download

File name 01_WD16C451_WD16C551.pdf

SYSTEMS LOGIC/PERIPHERAL WD16C451, WDl6C551 Enhanced Asynchronous Communications Element (ACE) with Parallel Port 9'}. WESTERN DIGITAL WD16C4511WD16C551 TABLE OF CONTENTS Section Title Page 1.0 INTRODUCTION 1-1 1.1 Description 1-1 1.2 Features 1-1 2.0 SIGNAL DESCRIPTIONS 1-4 3.0 SERIAL CHANNEL REGISTERS 1-10 3.1 Serial Port Register Addressing 1-10 4.0 ACE OPERATIONAL DESCRIPTION 1-11 4.1 Master Reset 1-11 4.2 ACE Accessible Registers 1-11 4.3 Line Control Register 1-14 4.4 ACE Programmable Baud Rate Generator 1-14 4.5 Line Status Register . . . . 1-17 4.6 Interrupt Identification Register 1-18 4.7 Interrupt Enable Register 1-20 4.8 Scratch Pad Register 1-20 4.9 FIFO Control Register . 1-20 5.0 MODEM CONTROL REGISTER 1-21 6.0 MODEM STATUS REGISTER 1-22 6.1 FIFO Interrupt Mode Operation Notes 1-22 6.2 FIFO Pointer Notes . . . . . . . 1-22 6.3 FIFO Polling Mode Operation Notes 1-23 7.0 PARALLEL PORT DESCRIPTION 1-24 8.0 TYPICALAPPLICATIONS ... 1-26 9.0 CRYSTAL MANUFACTURES (Partial List) 1-28 APPENDICES Section Title Page A.O DC OPERATING CHARACTERISTICS 1-30 B.O AC OPERATING CHARACTERISTICS AND TIMING DIAGRAMS 1-33 C.O PACKAGE DIAGRAM 1-45 11/15/90 1-i WD16C4511WD16C551 LIST OF ILLUSTRATIONS Figure Title Page 1-1 68-Pin QUAD