manuais ZiLOG Z80230

Zilog Z80230 Manual do Utilizador (394 páginas)

Marca: Zilog | Categoria: Sensores | Tamanho: 11.83 MB |

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Índice

SCC/ESCC

1

UM010903-0515

2

Revision History

3

Table of Contents

4

SCC’s Capabilities

9

User Manual

13

SCC Block Diagram

13

Pin Descriptions

14

Z85X30 DIP Pin Assignments

17

Z85X30 PLCC Pin Assignments

18

Z80X30 DIP Pin Assignments

19

Interfacing the SCC/ESCC

24

Z80X30 Write Cycle Timing

25

Z80X30 Register Access

28

Z80C30 Register Enhancement

31

Z80230 Register Enhancements

32

Z80X30 Reset

33

Z85X30 Interface Timing

34

Z85X30 Read Cycle Timing

35

Z85X30 Write Cycle Timing

35

D7-D0 Vector

36

Z85X30 Register Access

37

Z85C30 Register Enhancement

39

Z85X30 Reset

41

Interface Programming

42

I/O Programming Introduction

43

Interrupts

43

External/Status Channel A

44

Receive Channel B

44

Transmit Channel B

44

* Always 0 In B Channel

47

Daisy-Chain Resolution

48

Interrupt Acknowledge

51

The Receiver Interrupt

52

Receive Interrupts Disabled

53

Conditio

56

External/Status Interrupts

63

Break/Abort

65

Transmit Underrun/EOM

65

CTS/DCD

66

Zero Count

66

Sync/Hunt

66

Block/DMA Transfer

67

SYNC Modes

68

ASYNC Modes

68

Wait On Receive

69

DMA Requests

70

DMA Request On Receive

74

AD7-AD0 Receive DataWR8

75

Test Functions

76

Introduction

78

Baud Rate Generator

78

Data Encoding/Decoding

81

Clock Selection

90

Clock Multiplexer

92

BRG Clock Source = /RTXC

93

Crystal Oscillator

94

Data Communication Modes

95

Transmit Data Path

96

Asynchronous Mode

99

Asynchronous Transmit

100

Asynchronous Receive

103

Asynchronous Initialization

105

Reg Bit No Description

107

WR4 3 (=0) select sync mode

107

State Changes in One

113

/RTxC Clock Cycle

113

SDLC Transmit

121

SDLC Receive

127

SDLC Frame Status FIFO

133

Frame Status FIFO Circuitr

135

Interface

135

SDLC Loop Mode

137

SDLC Loop Mode Receive

140

SDLC Loop Mode Transmit

140

Register Descriptions

143

Write Registers

145

Definition)

149

Z85X30 Register Map

151

Time Constant

175

Clock Frequency

175

Read Registers

181

Read Register 1

185

Read Register 2

187

Read Register 3

188

Read Register 8

191

Read Register 10

192

Read Register 12

193

Read Register 13

194

Read Register 15

194

Application Notes

195

Abstract

217

Features

217

Discussion

217

Interfaces

218

Z180 to Memory Interface

218

EPROM Interface

220

SRAM Interface

222

SRAM Read Cycle

222

SRAM Write Cycle

223

Memory Interface Logic

223

Physical Memory Address Map

225

Z180 to I/O Interface

226

Z180 I/O Write Cycle Timing

227

Z180 to SCC Interface

230

CPU Hardware Interfacing

230

Data Bus Signals

230

System Control Signals

230

Interrupt Control

231

SCC I/O Operation

231

Read Cycle Timing

231

Write Cycle Timing

232

SCC Interrupt Operation

232

Input/Output Cycles

234

Z180 MPU to SCC Interface

234

SCC I/O Read/Write Cycle

235

I/O Read Cycle

235

I/O Write Cycle

235

Using EPLD

242

System Checkout

243

Software Considerations

244

SCC Read Cycle Proof

244

SCC Write Cycle Proof

244

Interrupt Acknowledge Cycle

244

(Continued)

246

Summary

256

General Description

257

Processor

258

Address Map

260

(PBA)+511

269

Serial Interfacing

270

DMA channel

272

Jumper Summary

276

Control EPLD for 186 Board

278

SCC EPLD for 186 Board

279

DMA EPLD for 186 Board

280

NMI Field for 186 Board

281

Operation

295

ESCC Controller

318

Questions and Answers

382

Customer Support

394

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