SH7243 datasheet(13/1726 Pages) RENESAS

13 / 1726 page

Rev. 1.00 Jun. 26, 2008 Page xiii of xxx

7.3.13

Break Control Register (BRCR) ....................................................................... 185

7.4

Operation .......................................................................................................................... 189

7.4.1

Flow of the User Break Operation .................................................................... 189

7.4.2

Break on Instruction Fetch Cycle...................................................................... 190

7.4.3

Break on Data Access Cycle............................................................................. 191

7.4.4

Value of Saved Program Counter ..................................................................... 192

7.4.5

Usage Examples................................................................................................ 193

7.5

Usage Notes ...................................................................................................................... 196

Section 8 Data Transfer Controller (DTC) ..........................................................197

8.1

Features............................................................................................................................. 197

8.2

Register Descriptions ........................................................................................................ 199

8.2.1

DTC Mode Register A (MRA) ......................................................................... 200

8.2.2

DTC Mode Register B (MRB).......................................................................... 201

8.2.3

DTC Source Address Register (SAR)............................................................... 203

8.2.4

DTC Destination Address Register (DAR)....................................................... 203

8.2.5

DTC Transfer Count Register A (CRA) ........................................................... 204

8.2.6

DTC Transfer Count Register B (CRB)............................................................ 205

8.2.7

DTC Enable Registers A to E (DTCERA to DTCERE) ................................... 206

8.2.8

DTC Control Register (DTCCR) ...................................................................... 207

8.2.9

DTC Vector Base Register (DTCVBR)............................................................ 209

8.2.10

Bus Function Extending Register (BSCEHR) .................................................. 209

8.3

Activation Sources............................................................................................................ 210

8.4

Location of Transfer Information and DTC Vector Table ................................................ 211

8.5

Operation .......................................................................................................................... 216

8.5.1

Transfer Information Read Skip Function ........................................................ 221

8.5.2

Transfer Information Write-Back Skip Function .............................................. 222

8.5.3

Normal Transfer Mode ..................................................................................... 222

8.5.4

Repeat Transfer Mode....................................................................................... 223

8.5.5

Block Transfer Mode ........................................................................................ 225

8.5.6

Chain Transfer .................................................................................................. 226

8.5.7

Operation Timing.............................................................................................. 228

8.5.8

Number of DTC Execution Cycles ................................................................... 231

8.5.9

DTC Bus Release Timing ................................................................................. 233

8.5.10

DTC Activation Priority Order ......................................................................... 236

8.6

DTC Activation by Interrupt............................................................................................. 237

8.7

Examples of Use of the DTC ............................................................................................ 238

8.7.1

Normal Transfer Mode ..................................................................................... 238

8.7.2

Chain Transfer when Transfer Counter = 0 ...................................................... 239

8.8

Interrupt Sources...............................................................................................................241

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