HD6432147SW datasheet(28/1177 Pages) RENESAS

28 / 1177 page

Rev. 4.00 Sep 27, 2006 page xxviii of xliv

Section 6 Bus Controller ................................................................................................... 151

6.1

Overview........................................................................................................................... 151

6.1.1

Features................................................................................................................ 151

6.1.2

Block Diagram ..................................................................................................... 152

6.1.3

Pin Configuration................................................................................................. 153

6.1.4

6.2

Register Descriptions ........................................................................................................ 154

6.2.1

Bus Control Register (BCR) ................................................................................ 154

6.2.2

Wait State Control Register (WSCR) .................................................................. 155

6.3

Overview of Bus Control .................................................................................................. 157

6.3.1

Bus Specifications................................................................................................ 157

6.3.2

Advanced Mode ................................................................................................... 158

6.3.3

Normal Mode....................................................................................................... 158

6.3.4

I/O Select Signal .................................................................................................. 159

6.4

Basic Bus Interface ........................................................................................................... 160

6.4.1

Overview.............................................................................................................. 160

6.4.2

Data Size and Data Alignment............................................................................. 160

6.4.3

Valid Strobes........................................................................................................ 162

6.4.4

Basic Timing........................................................................................................ 163

6.4.5

Wait Control ........................................................................................................ 171

6.5

Burst ROM Interface......................................................................................................... 173

6.5.1

Overview.............................................................................................................. 173

6.5.2

Basic Timing........................................................................................................ 173

6.5.3

Wait Control ........................................................................................................ 175

6.6

Idle Cycle .......................................................................................................................... 175

6.6.1

Operation ............................................................................................................. 175

6.6.2

Pin States in Idle Cycle ........................................................................................ 176

6.7

Bus Arbitration.................................................................................................................. 177

6.7.1

Overview.............................................................................................................. 177

6.7.2

Operation ............................................................................................................. 177

6.7.3

Bus Transfer Timing ............................................................................................ 178

Section 7 Data Transfer Controller (DTC)................................................................... 179

7.1

Overview........................................................................................................................... 179

7.1.1

Features................................................................................................................ 179

7.1.2

Block Diagram ..................................................................................................... 180

7.1.3

7.2

Register Descriptions ........................................................................................................ 182

7.2.1

DTC Mode Register A (MRA) ............................................................................ 182

7.2.2

DTC Mode Register B (MRB)............................................................................. 184

7.2.3

DTC Source Address Register (SAR).................................................................. 185

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