SH7641 Datasheet, PDF (15/1036 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family / SH7641 Series

6.2 Register Descriptions ......................................................................................................... 166
6.2.1 Standby Control Register (STBCR)...................................................................... 166
6.2.2 Standby Control Register 2 (STBCR2)................................................................. 167
6.2.3 Standby Control Register 3 (STBCR3)................................................................. 168
6.2.4 Standby Control Register 4 (STBCR4)................................................................. 170
6.3 Operation ........................................................................................................................... 171
6.3.1 Sleep Mode ........................................................................................................... 171
6.3.2 Standby Mode ....................................................................................................... 172
6.3.3 Module Standby Function..................................................................................... 174
6.3.4 STATUS Pin Change Timings.............................................................................. 174
Section 7 Cache .................................................................................................179
7.1 Features.............................................................................................................................. 179
7.1.1 Cache Structure..................................................................................................... 180
7.2 Register Descriptions ......................................................................................................... 182
7.2.1 Cache Control Register 1 (CCR1) ........................................................................ 182
7.2.2 Cache Control Register 2 (CCR2) ........................................................................ 183
7.3 Cache Operation................................................................................................................. 186
7.3.1 Searching Cache ................................................................................................... 186
7.3.2 Read Access.......................................................................................................... 188
7.3.3 Prefetch Operation ................................................................................................ 188
7.3.4 Write Access ......................................................................................................... 188
7.3.5 Write-Back Buffer ................................................................................................ 189
7.3.6 Coherency of Cache and External Memory .......................................................... 189
7.4 Memory-Mapped Cache .................................................................................................... 190
7.4.1 Address Array ....................................................................................................... 190
7.4.2 Data Array ............................................................................................................ 190
7.4.3 Usage Examples.................................................................................................... 192
Section 8 X/Y Memory......................................................................................193
8.1 Features.............................................................................................................................. 193
8.2 X/Y Memory Access from CPU ........................................................................................ 194
8.3 X/Y Memory Access from DSP......................................................................................... 194
8.4 X/Y Memory Access from DMAC .................................................................................... 195
8.5 Usage Note......................................................................................................................... 195
8.6 Sleep Mode ........................................................................................................................ 195
8.7 Address Error ..................................................................................................................... 195
Section 9 Exception Handling ...........................................................................197
9.1 Register Descriptions ......................................................................................................... 198
Rev. 4.00 Sep. 14, 2005 Page xv of l