Zilog Z16C30 Manual do Utilizador descarregar pdf (Página 5)

Z16C30 USC

USER'S MANUAL

ZILOG

UM97USC0100

TABLE OF CONTENTS

Chapter 1 Introduction

1.1 Introduction ....................................................................................................... 1-1

1.2 Features............................................................................................................. 1-1

1.3 Logic Symbol..................................................................................................... 1-2

1.4 Packaging ......................................................................................................... 1-3

1.5 Overview of the USC and this Manual............................................................... 1-4

1.5.1 Bus Interfacing ....................................................................................... 1-4

1.5.2 Serial Interfacing..................................................................................... 1-4

1.5.3 Serial Modes and Protocols.................................................................... 1-4

1.5.4 DMA Operation ....................................................................................... 1-4

1.5.5 Interrupts ................................................................................................ 1-4

1.5.6 Software Summary.................................................................................. 1-4

1.6 Device Structure .............................................................................................. 1-12

1.6.1 The Transmit Data Path ........................................................................ 1-12

1.6.2 The Receive Data Path ......................................................................... 1-12

1.6.3 Clocking................................................................................................ 1-12

1.6.4 Interrupts .............................................................................................. 1-12

1.7 Document Structure ........................................................................................ 1-13

Chapter 2 Bus Interfacing

2.1 Introduction ....................................................................................................... 2-1

2.2 Multiplexed/Non-Multiplexed Operation............................................................ 2-1

2.3 Read/Write Data Strobes ................................................................................... 2-3

2.4 Bus Width .......................................................................................................... 2-4

2.5 ACK vs. WAIT Handshaking.............................................................................. 2-4

2.6 Pin Descriptions ................................................................................................ 2-5

2.7 Pull-up Resistors and Unused Pins ................................................................... 2-7

2.8 The Bus Configuration Register (BCR).............................................................. 2-7

2.8.1 WAIT vs. Ready Selection ...................................................................... 2-7

2.8.2 Bits and Fields in the BCR ...................................................................... 2-7

2.9 Register Addressing.......................................................................................... 2-8

2.9.1 Implicit Data Register Addressing.......................................................... 2-8

2.9.2 Direct Register Addressing on AD13-AD8 ............................................. 2-8

2.9.3 Direct Register Addressing on AD6-AD0/7-1 ......................................... 2-9

2.9.4 Indirect Register Addressing in the CCAR ............................................. 2-9

2.9.5 About the Register Address Tables ..................................................... 2-10

2.9.6 Serial Data Registers TDR & RDR ........................................................ 2-14

2.9.7 Byte Ordering ....................................................................................... 2-14

2.9.8 Register Read & Write Cycles .............................................................. 2-14

Z16C30 USC

USER'S MANUAL

HAPTER TITLE AND SUBSECTIONS PAGE

UM009402-0201

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