SH7265 datasheet(13/2024 Pages) RENESAS

13 / 2024 page

Rev. 1.00 Mar. 14, 2008 Page xiii of xxxvi

7.12.1

Timing to Clear an Interrupt Source ................................................................. 222

Section 8 User Break Controller (UBC) ............................................................223

8.1

Features............................................................................................................................. 224

8.2

Input/Output Pin ............................................................................................................... 226

8.3

Register Descriptions ........................................................................................................ 226

8.3.1

Break Address Register (BAR)......................................................................... 227

8.3.2

Break Address Mask Register (BAMR) ........................................................... 228

8.3.3

Break Data Register (BDR) .............................................................................. 229

8.3.4

Break Data Mask Register (BDMR) ................................................................. 230

8.3.5

Break Bus Cycle Register (BBR)...................................................................... 231

8.3.6

Break Control Register (BRCR) ....................................................................... 233

8.4

Operation .......................................................................................................................... 236

8.4.1

Flow of the User Break Operation .................................................................... 236

8.4.2

Break on Instruction Fetch Cycle...................................................................... 237

8.4.3

Break on Data Access Cycle............................................................................. 238

8.4.4

Value of Saved Program Counter ..................................................................... 239

8.4.5

Usage Examples................................................................................................ 240

8.5

Usage Notes ...................................................................................................................... 243

Section 9 Cache .................................................................................................245

9.1

Features............................................................................................................................. 245

9.1.1

Cache Structure................................................................................................. 245

9.2

Register Descriptions ........................................................................................................ 248

9.2.1

Cache Control Register 1 (CCR1) .................................................................... 248

9.2.2

Cache Control Register 2 (CCR2) .................................................................... 250

9.3

Operation .......................................................................................................................... 254

9.3.1

Searching Cache ............................................................................................... 254

9.3.2

Read Access...................................................................................................... 256

9.3.3

Prefetch Operation (Only for Operand Cache) ................................................. 256

9.3.4

Write Operation (Only for Operand Cache)...................................................... 257

9.3.5

Write-Back Buffer (Only for Operand Cache).................................................. 258

9.3.6

Coherency of Cache and External Memory ...................................................... 260

9.4

Memory-Allocated Cache................................................................................................. 260

9.4.1

Address Array ................................................................................................... 260

9.4.2

Data Array ........................................................................................................ 261

9.4.3

Usage Examples................................................................................................ 263

9.4.4

Notes ................................................................................................................. 263

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