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Z-80A Dataheets PDF



Part Number Z-80A
Manufacturers ETC
Logo ETC
Description Z80A
Datasheet Z-80A DatasheetZ-80A Datasheet (PDF)

www.DataSheet4U.com www.DataSheet4U.com Z80 Family CPU Peripherals User Manual UM008101-0601 www.DataSheet4U.com ZiLOG Worldwide Headquarters • 910 E. Hamilton Avenue • Campbell, CA 95008 Telephone: 408.558.8500 • Fax: 408.558.8300 • www.ZiLOG.com www.DataSheet4U.com Z80 CPU Peripherals User Manual www.DataSheet4U.com ii This publication is subject to replacement by a later edition. To determine whether a later edition exists, or to request copies of publications, contact: ZiLOG Worldwi.

  Z-80A   Z-80A



Document
www.DataSheet4U.com www.DataSheet4U.com Z80 Family CPU Peripherals User Manual UM008101-0601 www.DataSheet4U.com ZiLOG Worldwide Headquarters • 910 E. Hamilton Avenue • Campbell, CA 95008 Telephone: 408.558.8500 • Fax: 408.558.8300 • www.ZiLOG.com www.DataSheet4U.com Z80 CPU Peripherals User Manual www.DataSheet4U.com ii This publication is subject to replacement by a later edition. To determine whether a later edition exists, or to request copies of publications, contact: ZiLOG Worldwide Headquarters 910 E. Hamilton Avenue Campbell, CA 95008 Telephone: 408.558.8500 Fax: 408.558.8300 www.ZiLOG.com Windows is a registered trademark of Microsoft Corporation. Document Disclaimer ©2001 by ZiLOG, Inc. All rights reserved. Information in this publication concerning the devices, applications, or technology described is intended to suggest possible uses and may be superseded. ZiLOG, INC. DOES NOT ASSUME LIABILITY FOR OR PROVIDE A REPRESENTATION OF ACCURACY OF THE INFORMATION, DEVICES, OR TECHNOLOGY DESCRIBED IN THIS DOCUMENT. ZiLOG ALSO DOES NOT ASSUME LIABILITY FOR INTELLECTUAL PROPERTY INFRINGEMENT RELATED IN ANY MANNER TO USE OF INFORMATION, DEVICES, OR TECHNOLOGY DESCRIBED HEREIN OR OTHERWISE. Devices sold by ZiLOG, Inc. are covered by warranty and limitation of liability provisions appearing in the ZiLOG, Inc. Terms and Conditions of Sale. ZiLOG, Inc. makes no warranty of merchantability or fitness for any purpose Except with the express written approval of ZiLOG, use of information, devices, or technology as critical components www.DataSheet4U.com of life support systems is not authorized. No licenses are conveyed, implicitly or otherwise, by this document under any intellectual property rights. UM008101-0601 Disclaimer www.DataSheet4U.com Z80 CPU Peripherals User Manual www.DataSheet4U.com iii Table of Contents Counter/Timer Channels CTC Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 CTC General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 CTC Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Structure of Channel Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Interrupt Control Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 CTC Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 Pin Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 CTC Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 CTC Counter Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 CTC Timer Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 CTC Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 Loading The Channel Control Register . . . . . . . . . . . . . . . . . . . .19 Loading The Time Constant Register . . . . . . . . . . . . . . . . . . . . . .22 Loading The Interrupt Vector Register . . . . . . . . . . . . . . . . . . . . .22 CTC Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 CTC Write Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 CTC Read Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25 CTC Counting and Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 CTC Interrupt Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27 Interrupt Acknowledge Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 www.DataSheet4U.com Return from Interrupt Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 Daisy-Chain Interrupt Servicing . . . . . . . . . . . . . . . . . . . . . . . . . .30 UM008101-0601 Table of Contents www.DataSheet4U.com Z80 CPU Peripherals User Manual www.DataSheet4U.com iv Direct Memory Access DMA Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33 CPU Data Transfers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33 DMA Data Transfers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 DMA Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37 DMA Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.


8051F023 Z-80A D8243HC


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