HD6432621 Hitachi, HD6432621 Datasheet - Page 32

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Section 7
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
iv
6.3.2
6.3.3
6.3.4
6.3.5
6.3.6
6.3.7
Overview............................................................................................................................ 135
7.1.1
7.1.2
7.1.3
7.1.4
Register Descriptions......................................................................................................... 139
7.2.1
7.2.2
7.2.3
7.2.4
7.2.5
7.2.6
Overview of Bus Control................................................................................................... 150
7.3.1
7.3.2
7.3.3
7.3.4
Basic Bus Interface............................................................................................................ 154
7.4.1
7.4.2
7.4.3
7.4.4
7.4.5
Burst ROM Interface ......................................................................................................... 167
7.5.1
7.5.2
7.5.3
Idle Cycle........................................................................................................................... 170
7.6.1
7.6.2
Write Data Buffer Function ............................................................................................... 173
Bus Release........................................................................................................................ 174
7.8.1
7.8.2
7.8.3
PC Break Interrupt Due to Data Access ............................................................... 129
Notes on PC Break Interrupt Handling ................................................................ 130
Operation in Transitions to Power-Down Modes ................................................ 130
PC Break Operation in Continuous Data Transfer ............................................... 131
When Instruction Execution is Delayed by One State ......................................... 132
Additional Notes .................................................................................................. 133
Bus Controller
Features ................................................................................................................ 135
Block Diagram...................................................................................................... 136
Pin Configuration ................................................................................................. 137
Register Configuration ......................................................................................... 138
Bus Width Control Register (ABWCR) ............................................................... 139
Access State Control Register (ASTCR).............................................................. 140
Wait Control Registers H and L (WCRH, WCRL).............................................. 141
Bus Control Register H (BCRH).......................................................................... 145
Bus Control Register L (BCRL)........................................................................... 147
Pin Function Control Register (PFCR) ................................................................ 148
Area Partitioning .................................................................................................. 150
Bus Specifications ................................................................................................ 151
Memory Interfaces................................................................................................ 152
Interface Specifications for Each Area................................................................. 153
Overview .............................................................................................................. 154
Data Size and Data Alignment ............................................................................. 154
Valid Strobes ........................................................................................................ 156
Basic Timing ........................................................................................................ 157
Wait Control ......................................................................................................... 165
Overview .............................................................................................................. 167
Basic Timing ........................................................................................................ 167
Wait Control ......................................................................................................... 169
Operation .............................................................................................................. 170
Pin States in Idle Cycle ........................................................................................ 172
Overview .............................................................................................................. 174
Operation .............................................................................................................. 174
Pin States in External Bus Released State............................................................ 175
.................................................................................................. 135