Western Digital 02 WD16C452 WD16C552 free download

File name 02_WD16C452_WD16C552.pdf

SYSTEIIS L061C/PERIPHERAL WD16C452, WD16C552 Dual Enhanced Asynchronous Communications Element (ACE) with Parallel Port W. WESTERN DIGITAL WD16C4521WD16C552 TABLE OF CONTENTS Section Title Page 1.0 INTRODUCTION 2-1 1.1 Description 2-1 1.2 Features 2-1 1.3 General 2-1 2.0 SIGNAL DESCRIPTIONS 2-3 3.0 SERIAL CHANNEL REGISTERS 2-S 3.1 Serial Port Register Addressing 2-S 4.0 ACE OPERATIONAL DESCRIPTION 2-9 4.1 Master Reset ... 2-9 4.2 ACE Accessible Registers 2-9 4.3 Line Control Register 2-12 4.4 ACE Programmable Baud Rate Generator 2-12 4.5 Line Status Register . . . . 2-15 4.6 Interrupt Identification Register 2-16 4.7 Interrupt Enable Register 2-18 4.S Scratch Pad Register 2-18 4.9 FIFO Control Register . 2-18 5.0 MODEM CONTROL REGISTER 2-19 6.0 MODEM STATUS REGISTER 2-20 7.0 PARALLEL PORT DESCRIPTION 2-21 S.O TYPICAL APPLICATIONS . . . 2-23 APPENDICES Section Title Page A.O DC OPERATING CHARACTERISTICS 2-25 B.O AC OPERATING CHARACTERISTICS AND TIMING DIAGRAMS 2-28 C.O PACKAGE DIAGRAM 2-40 11121/90 2-i ~D16C452~D16C552 LIST OF ILLUSTRATIONS Figure Title Page 1-2 WD16C4521WD16C552 810ck Diagram ... ... 2-2 2-1 WD16C452IWD16C552 68-Pin QUAD Assembly Pin Designations 2-3 5-1 Interrupt Signal Logic . . . . . . . . . . . . . . . . . . 2-19 8-1 Typical Interface for a High-Capacity Data 8us