Rev. 2.00, 09/03, page xxii of xlvi
7.2
Pin Configuration ........................................................................................................ 151
7.3
Area Overview............................................................................................................. 152
7.3.1
Address Map ................................................................................................... 152
7.3.2
Memory Bus Width ......................................................................................... 154
7.3.3
Shadow Space ................................................................................................. 155
7.4
Register Descriptions................................................................................................... 155
7.4.1
Common Control Register (CMNCR) .............................................................. 156
7.4.2
CSn Space Bus Control Register (CSnBCR) (n = 0, 2, 3, 4, 5A, 5B, 6A, 6B) .... 158
7.4.3
CSn Space Wait Control Register (CSnWCR) (n = 0, 2, 3, 4, 5A, 5B, 6A, 6B) . 161
7.4.4
SDRAM Control Register (SDCR) .................................................................. 174
7.4.5
Refresh Timer Control/Status Register (RTCSR) ............................................. 177
7.4.6
Refresh Timer Counter (RTCNT) .................................................................... 179
7.4.7
Refresh Time Constant Register (RTCOR) ...................................................... 179
7.4.8
Reset Wait Counter (RWTCNT)...................................................................... 180
7.5
Endian/Access Size and Data Alignment ...................................................................... 180
7.6
Normal Space Interface................................................................................................ 187
7.6.1
Basic Timing................................................................................................... 187
7.6.2
Access Wait Control........................................................................................ 192
7.6.3
CSn Assert Period Expansion .......................................................................... 194
7.7
Address/Data Multiplex I/O Interface........................................................................... 195
7.8
SDRAM Interface........................................................................................................ 198
7.8.1
SDRAM Direct Connection ............................................................................. 198
7.8.2
Address Multiplexing ...................................................................................... 200
7.8.3
Burst Read ...................................................................................................... 212
7.8.4
Single Read..................................................................................................... 214
7.8.5
Burst Write ..................................................................................................... 215
7.8.6
Single Write .................................................................................................... 217
7.8.7
Bank Active .................................................................................................... 218
7.8.8
Refreshing....................................................................................................... 225
7.8.9
Low-Frequency Mode ..................................................................................... 228
7.8.10 Power-On Sequence ........................................................................................ 229
7.9
Burst ROM Interface.................................................................................................... 231
7.10
Byte-Selection SRAM Interface ................................................................................... 233
7.11
Wait between Access Cycles ........................................................................................ 235
7.12
Bus Arbitration ............................................................................................................ 235
7.13
Others.......................................................................................................................... 237
Section 8 Direct Memory Access Controller (DMAC)....................................239
8.1
Features....................................................................................................................... 239
8.2
Input/Output Pins......................................................................................................... 241
8.3
Register Descriptions................................................................................................... 241
8.3.1
DMA Source Address Registers (SAR)............................................................ 242
8.3.2
DMA Destination Address Registers (DAR) .................................................... 242
Summary of Contents for SH7705
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