Datasheet

Table Of Contents
Page xvi of liv REJ09B0140-0900 Rev. 9.00
Sep 16, 2010
6.6 Basic Bus Interface........................................................................................................... 127
6.6.1 Data Size and Data Alignment.......................................................................... 127
6.6.2 Valid Strobes .................................................................................................... 128
6.6.3 Basic Timing..................................................................................................... 129
6.6.4 Wait Control ..................................................................................................... 138
6.7 urst ROM Interface........................................................................................................... 139
6.7.1 Basic Timing..................................................................................................... 140
6.7.2 Wait Control ..................................................................................................... 141
6.8 Idle Cycle.......................................................................................................................... 142
6.9 Bus Release....................................................................................................................... 145
6.9.1 Notes on Bus Release ....................................................................................... 146
6.10 Bus Arbitration ................................................................................................................. 147
6.10.1 Operation .......................................................................................................... 147
6.10.2 Bus Transfer Timing......................................................................................... 147
6.10.3 External Bus Release Usage Note..................................................................... 148
6.11 Resets and the Bus Controller........................................................................................... 148
Section 7 DMA Controller (DMAC).............................................................................. 149
7.1 Features............................................................................................................................. 149
7.2 Register Configuration...................................................................................................... 151
7.3 Register Descriptions........................................................................................................ 153
7.3.1 Memory Address Registers (MAR) .................................................................. 153
7.3.2 I/O Address Register (IOAR) ........................................................................... 153
7.3.3 Execute Transfer Count Register (ETCR) ........................................................ 154
7.3.4 DMA Control Register (DMACR) ................................................................... 155
7.3.5 DMA Band Control Register (DMABCR) ....................................................... 162
7.3.6 DMA Write Enable Register (DMAWER)....................................................... 170
7.4 Operation .......................................................................................................................... 172
7.4.1 Transfer Modes................................................................................................. 172
7.4.2 Sequential Mode............................................................................................... 173
7.4.3 Idle Mode.......................................................................................................... 176
7.4.4 Repeat Mode..................................................................................................... 178
7.4.5 Normal Mode.................................................................................................... 181
7.4.6 Block Transfer Mode........................................................................................ 184
7.4.7 DMAC Activation Sources............................................................................... 189
7.4.8 Basic DMAC Bus Cycles.................................................................................. 191
7.4.9 DMAC Bus Cycles (Dual Address Mode)........................................................ 192
7.4.10 DMAC Multi-Channel Operation..................................................................... 197
7.4.11 Relation between the DMAC, External Bus Requests, and the DTC ............... 198
7.4.12 NMI Interrupts and DMAC .............................................................................. 198