MC68030RC33

Manufacturer Part NumberMC68030RC33
DescriptionMC68030RC33ENHANCED 32-BIT MICROPROCESSOR
ManufacturerMotorola
MC68030RC33 datasheet
 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Page 31
32
Page 32
33
Page 33
34
Page 34
35
Page 35
36
Page 36
37
Page 37
38
Page 38
39
Page 39
40
Page 40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
Page 39/602:

DATA ORGANIZATION AND ADDRESSING CAPABILITIES

Download datasheet (4Mb)Embed
PrevNext
SECTION 2
DATA ORGANIZATION AND ADDRESSING
CAPABILITIES
Most external references to memory by a microprocessor are either program references or
data references; they either access instruction words or operands (data items) for an
instruction. Program references are references to the program space, the section of memory
that contains the program instructions and any immediate data operands that reside in the
instruction stream. Refer to M68000PM/AD, M68000 Programmer's Reference Manual , for
descriptions of the instructions in the program space. Data references refer to the data
space, the section of memory that contains the program data. Data items in the instruction
stream can be accessed with the program counter relative addressing modes, and these
accesses are classified as program references. A third type of external reference used for
coprocessor communications, interrupt acknowledge cycles, and breakpoint acknowledge
cycles is classified as a CPU space reference. The MC68030 automatically sets the function
codes to access the program space, the data space, or the CPU space for special functions
as required. The function codes can be used by the memory management unit to organize
separate program (read only) and data (read-write) memory areas.
This section describes the data organization and addressing capabilities of the MC68030. It
lists the types of operands used by instructions and describes the registers and their use as
operands. Next, the section describes the organization of data in memory and the
addressing modes available to access data in memory. Last, the section describes the
system stack and user program stacks and queues.
2.1 INSTRUCTION OPERANDS
The MC68030 supports a general-purpose set of operands to serve the requirements of a
large range of applications. Operands of MC68030 instructions may reside in registers, in
memory, or within the instructions themselves. An instruction operand might also reside in
a coprocessor. An operand may be a single bit, a bit field of from 1 to 32 bits in length, a byte
(8 bits), a word (16 bits), a long word (32 bits), or a quad word (64 bits). The operand size
for each instruction is either explicitly encoded in the instruction or implicitly defined by the
instruction operation. Coprocessors are designed to support special computation models
that require very specific but widely varying data operand types and sizes. Hence,
coprocessor instructions can specify operands of any size.
MOTOROLA
MC68030 USER’S MANUAL
2-1