83:
139:
1422:
1412:
1388:
123:
107:
99:
75:
147:
131:
91:
1400:
603:
1078:
342:
series consists of 4-bit microcontrollers. Only the first device in the series, the μPD7520, was still developed in PMOS technology. All subsequent microcontrollers in the series (μPD7502 etc.) used CMOS. A ROM-less chip (μPD7500) in a 64-pin quad-in-line package was available for hardware and
313:
have the same basic instruction set. They differ in the amount of ROM and RAM, the number of I/O pins, and the package (28-pin or 42-pin). A ROM-less chip (μPD556) in a 64-pin quad-in-line package was available for hardware and software development. Beginning in 1980, they there were gradually
622:
The processor has 93 basic instructions, consisting of 1 to 3 16-bit words. The memory space of 1 Mbyte (512K words) is byte-addressable. The I/O address space is 2048 bytes. There are 14 general-purpose registers. The processor has a 2-input vector interrupt, DMA control, refresh control for
264:
microcontroller in a 42-pin package. It has built-in ROM (1920 × 10 bit) and RAM (96 × 4 bit) as well as keyboard, display, and printer controllers. The μPD548 requires a power supply of -10V and the outputs can switch up to -35V. A ROM-less chip (μPD555) in a 64-pin quad-in-line package was
562:
to the μCOM-87. The register configuration consists of two sets of 8 registers each (A, V, B, C, D, E, H, L). The V register is a vector register that stores the upper 8 bits of the address of the working memory area, and the short address space which is fixed in the current
115:
154:
The μCOM series has its roots in one of the world's earliest microprocessor chipsets, the two-chip processor μPD707 / μPD708. Early in 1970, Coca Cola Japan set out to increase the efficiency of their sales outlets by introducing new
436:. The μPD780C corresponds to the original Z80 (max. 2.5 MHz clock), while the μPD780C-1 corresponds to the Z80A (max. 4 MHz clock) and the μPD780C-2 to the Z80B (max. 6 MHz clock). The μPD780C-1 was used in Sinclair's
198:(μPD751) is NEC's original single-chip 4-bit microprocessor, announced in 1973. Unlike the Intel 4040, the μPD751 has separate data and address buses. A number of peripheral integrated circuits were provided for the μPD751:
163:
was contracted to build these terminals, and NEC in turn to develop a chipset. The chipset development was complete in
December 1971, at about the same time as other early microprocessors in the USA.
170:. The μCOM-4 series (4 bit) and μCOM-16 series (16 bit) were original developments, while the μCOM-8 series (8 bit and 16 bit) consisted mostly of Intel- and Zilog-compatible microprocessors.
364:, but differs in its 42-pin package and its completely different pin-out. There are minor software differences as well, e.g. the setting of flags for the SUB instruction.
166:
Since then, NEC has developed and manufactured various microprocessors and microcontrollers. General-purpose products among them were given series names starting with
395:
instruction requires 4 clock cycles (Intel 8080: 5 clock cycles). SPHL and XTHL also executes one cycle faster than Intel 8080 but DAD executes one cycle slower.
46:
in the 1970s and 1980s. The initial entries in the series were custom-designed 4 and 16-bit designs, but later models in the series were mostly based on the
944:
410:
Unfortunately, these improvements cause some programs written for the Intel 8080 not to run correctly. To overcome this problem, NEC introduced the
414:(μPD8080AF) which is completely compatible with the Intel 8080 in all details. The 1979 catalog no longer listed the improved μPD8080A. With the
343:
software development. By 1982 the μCOM-75 series was referred to as the μPD7500 series and later replaced by the 75X and 75XL series.
82:
1425:
680:
599:
is a NEC original 16-bit microprocessor, implemented in two chips, the μPD755 (register + ALU) and μPD756 (controller), in 1974.
567:
can be freely arranged. The μPD7805 and μPD7806 have only one set of 7 registers (no V register). In the μPD7807 and later, the
1258:
937:
1446:
1189:
624:
384:
BCD arithmetic is supported for both addition and subtraction (Intel 8080: addition only). Similar to the N flag in the
330:
microcontroller in a 64-pin package. It has built-in ROM and RAM as well as keyboard, display, and printer controllers.
1263:
1138:
559:
181:
series appeared in the 1980s, and the μCOM-87AD series, for example, came to be described simply as the 87AD series.
1241:
1117:
976:
1157:
380:
and software-compatible with the μCOM-8. That is, the μPD8080A has some improvements compared to the Intel 8080:
1392:
1056:
981:
930:
998:
1415:
1284:
986:
420:, NEC offered a development board for μCOM-80, which due to its low price became popular with hobbyists.
1268:
1162:
1013:
1003:
991:
568:
388:, the μPD8080A has a SUB flag (bit 5 of the flag register) to indicate that a subtraction was performed.
885:
859:
827:
793:
767:
729:
575:
1130:
1061:
234:
microprocessor in a 42-pin package. The following peripheral integrated circuits were available:
1341:
1294:
1046:
277:
series consists of more than 10 different 4-bit microcontrollers. Broadly speaking, there are
160:
1346:
1326:
1289:
1101:
138:
1404:
1351:
1331:
39:
619:(μPD768) is a NEC original single-chip 16-bit microprocessor that was announced in 1978.
1361:
1310:
1209:
1204:
461:
457:
453:
35:
687:
1440:
1025:
465:
1051:
495:
491:
156:
1356:
445:
558:(μPD7810 etc.) are NEC original 8-bit microcontrollers. The μCOM-87AD adds an
535:
531:
511:
377:
361:
327:
282:
278:
261:
231:
63:
55:
47:
498:
compatible product, which is the 8-bit industry standard, was never offered.
1251:
433:
385:
51:
122:
106:
98:
74:
647:
571:
is expanded to 16 bit and an EA register is added for 16-bit operation.
146:
130:
90:
17:
1246:
360:(μPD753) is an 8-bit microprocessor that is software-compatible with the
602:
398:
3-byte instructions are allowed in an interrupt acknowledge cycle, so a
114:
1336:
1229:
1224:
1219:
1167:
1125:
1109:
1041:
539:
473:
402:
instruction to any memory address can be used (Intel 8080: only 1-byte
174:
59:
376:(μPD8080A) is an 8-bit microprocessor that is pin-compatible with the
1020:
1008:
916:"100 Year History of NEC Corporation" NEC, December 25, 2001, p. 669.
1077:
686:. Semiconductor History Museum of Japan. 2019-01-23. Archived from
1214:
601:
416:
145:
137:
129:
121:
113:
105:
97:
89:
81:
73:
1234:
490:(μPD8048 etc.) is compatible with Intel's 8-bit microcontroller
469:
441:
437:
290:
926:
538:
compatible 16-bit microprocessors. They were superseded by the
1194:
953:
627:, and a master/slave mode to enable multiprocessor operation.
579:
564:
449:
178:
43:
667:
NEC Databook 8-bit single-chip microcomputer Vol. 1 1994/1995
58:
16-bit design. Most of the line was replaced in 1984 by the
494:. CMOS microcontrollers up to μPD80C50 followed, but an
432:(μPD780) is an 8-bit microprocessor compatible with the
922:
681:"1970s Development and evolution of microprocessors"
1319:
1303:
1277:
1180:
1150:
1094:
1085:
1034:
969:
960:
403:
399:
392:
265:available for hardware and software development.
27:Series of microprocessors and microcontrollers
938:
464:) computers, in musical synthesizers such as
8:
864:. San Mateo, CA: NEC Electronics U.S.A., Inc
314:replaced by the μCOM-75 series (see below).
1091:
1076:
966:
945:
931:
923:
479:A CMOS version (μPD70008) followed later.
887:NEC Microcomputer Products 1984 Data Book
642:
640:
880:
878:
832:. Wellesley, MA: NEC Microcomputers, Inc
798:. Wellesley, MA: NEC Microcomputers, Inc
772:. Wellesley, MA: NEC Microcomputers, Inc
734:. Lexington, MA: NEC Microcomputers, Inc
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675:
673:
7:
1399:
907:NEC Databook Single Chip (8bit) 1983
890:. Mountain View, CA: NEC Electronics
578:. This series was superseded by the
710:NEC Electronic Device Data Book '76
173:The μCOM name disappeared when the
514:compatible 8-bit microprocessor.
25:
211:- Keyboard and display controller
1421:
1420:
1411:
1410:
1398:
1387:
1386:
54:8-bit designs, and later, the
1:
1163:NEC Philips Unified Systems
1139:Sharp NEC Display Solutions
1463:
1118:Japan Aviation Electronics
977:NEC Corporation of America
574:The series came in 64-pin
444:and early versions of the
406:instructions are allowed).
1370:
1158:NEC Mobile Communications
1074:
285:devices (μPD1500 series,
281:devices (μPD500 series),
1057:Reveal Computer Products
982:NEC Laboratories America
293:devices (μPD650 series,
999:NEC Solution Innovators
269:μCOM-43 through μCOM-46
1285:Walter Tenney Carleton
987:NEC Software Solutions
607:
151:
143:
135:
127:
119:
111:
103:
95:
87:
79:
1014:Netcracker Technology
1004:NEC Unified Solutions
605:
149:
141:
133:
125:
117:
109:
101:
93:
85:
77:
576:quad in-line package
554:(μPD7800 etc.) and
326:(μPD766) is a 4-bit
260:(μPD548) is a 4-bit
217:- Printer controller
1447:NEC microprocessors
1426:Video game consoles
1269:Video game consoles
1131:Renesas Electronics
1062:Zenith Data Systems
247:- ROM plus I/O port
94:μCOM-80F: μPD8080AF
1259:Personal computers
1181:Products, services
1086:Joint ventures and
608:
546:μCOM-87, μCOM-87AD
152:
144:
142:μCOM-87AD: μPD7810
136:
128:
120:
112:
104:
102:μCOM-82: μPD780C-1
96:
88:
80:
1434:
1433:
1342:NEC Green Rockets
1295:Tadahiro Sekimoto
1176:
1175:
1072:
1071:
1047:Electronic Arrays
606:μCOM-1600: μPD768
110:μCOM-82: μPD70008
16:(Redirected from
1454:
1424:
1423:
1414:
1413:
1402:
1401:
1390:
1389:
1375:Now wholly owned
1347:NEC Karuizawa 72
1327:NEC Blue Rockets
1290:Kunihiko Iwadare
1168:Sony NEC Optiarc
1143:
1135:
1122:
1114:
1106:
1102:Alaxala Networks
1092:
1080:
1052:Packard Bell NEC
967:
947:
940:
933:
924:
917:
914:
908:
905:
899:
898:
896:
895:
882:
873:
872:
870:
869:
861:NEC 1982 Catalog
856:
841:
840:
838:
837:
829:NEC 1981 Catalog
824:
807:
806:
804:
803:
795:NEC 1980 Catalog
790:
781:
780:
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769:NEC 1979 Catalog
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743:
742:
740:
739:
731:NEC 1977 Catalog
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698:
692:
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665:
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658:
656:
655:
644:
518:μCOM-86, μCOM-88
510:(μPD8085) is an
405:
401:
394:
205:- 8-bit I/O port
150:μCOM-88: μPD8088
134:μCOM-86: μPD8086
126:μCOM-85: μPD8085
118:μCOM-84: μPD8749
86:μCOM-75: μPD7508
42:manufactured by
40:microcontrollers
21:
1462:
1461:
1457:
1456:
1455:
1453:
1452:
1451:
1437:
1436:
1435:
1430:
1366:
1352:NEC Red Rockets
1337:NEC Cup (Japan)
1332:NEC Cup (China)
1315:
1299:
1273:
1190:Microprocessors
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36:microprocessors
34:is a series of
32:NEC μCOM series
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23:
22:
15:
12:
11:
5:
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1362:Sumitomo Group
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1349:
1344:
1339:
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1329:
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1314:
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1311:NEC Supertower
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1300:
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1264:Supercomputers
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703:
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632:
629:
612:
609:
592:
589:
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586:μCOM-16 series
584:
547:
544:
530:(μPD8088) are
526:(μPD8086) and
519:
516:
503:
500:
484:
481:
476:game console.
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422:
408:
407:
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389:
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270:
267:
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242:
241:- ROM plus RAM
230:(μPD541) is a
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220:
219:
218:
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206:
191:
188:
186:
183:
78:μCOM-4: μPD751
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68:
26:
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14:
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10:
9:
6:
4:
3:
2:
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1244:
1243:
1242:Mobile phones
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1233:
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1226:
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1206:
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1198:
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1188:
1187:
1185:
1183:and standards
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1149:
1140:
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1088:shareholdings
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961:Divisions and
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751:
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733:
732:
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723:
721:
719:
717:
713:
707:
704:
693:on 2019-06-27
689:
682:
676:
674:
670:
664:
661:
650:. AntiqueTech
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585:
583:
581:
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570:
566:
561:
560:A/D converter
557:
553:
545:
543:
541:
537:
533:
529:
525:
517:
515:
513:
509:
501:
499:
497:
493:
489:
482:
480:
477:
475:
471:
467:
466:Oberheim OB-8
463:
459:
455:
451:
448:, in several
447:
443:
439:
435:
431:
423:
421:
419:
418:
413:
397:
390:
387:
383:
382:
381:
379:
375:
367:
365:
363:
359:
351:
347:μCOM-8 series
346:
344:
341:
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317:
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185:μCOM-4 series
184:
182:
180:
176:
171:
169:
164:
162:
158:
157:POS terminals
148:
140:
132:
124:
116:
108:
100:
92:
84:
76:
69:
67:
65:
61:
57:
53:
49:
45:
41:
37:
33:
19:
1403:
1391:
1379:
1374:
1199:
963:subsidiaries
912:
903:
892:. Retrieved
886:
866:. Retrieved
860:
834:. Retrieved
828:
800:. Retrieved
794:
774:. Retrieved
768:
736:. Retrieved
730:
706:
695:. Retrieved
688:the original
663:
652:. Retrieved
621:
616:
614:
596:
594:
573:
555:
551:
549:
527:
523:
521:
507:
505:
487:
486:
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411:
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227:
225:
214:
208:
202:
195:
193:
172:
167:
165:
153:
31:
29:
1357:NEC Shun-Ei
1200:μCOM series
1126:NEC BIGLOBE
1042:NEC BIGLOBE
488:The μCOM-84
446:ZX Spectrum
894:2020-07-22
868:2020-07-21
836:2020-07-16
802:2020-07-16
776:2020-07-11
738:2020-07-13
697:2020-07-11
654:2020-07-11
631:References
580:78K series
565:78K series
536:Intel 8088
532:Intel 8086
512:Intel 8085
496:Intel 8051
378:Intel 8080
362:Intel 8080
64:Intel 8088
56:Intel 8086
48:Intel 8080
18:NEC µPD768
1416:Computers
648:"NEC 751"
617:μCOM-1600
611:μCOM-1600
556:μCOM-87AD
468:, and in
452:and NEC (
434:Zilog Z80
386:Zilog Z80
52:Zilog Z80
1441:Category
1393:Category
540:V series
412:μCOM-80F
295:μCOM-43C
287:μCOM-43N
175:V series
70:Overview
1405:Commons
1210:µPD7720
1205:µPD7220
1151:Defunct
1110:Anritsu
1095:Current
1035:Defunct
970:Current
597:μCOM-16
591:μCOM-16
552:μCOM-87
528:μCOM-88
524:μCOM-86
508:μCOM-85
502:μCOM-85
483:μCOM-84
474:SG-1000
462:PC-8800
458:PC-8000
454:PC-6000
430:μCOM-82
424:μCOM-82
393:MOV r,r
374:μCOM-80
368:μCOM-80
340:μCOM-75
334:μCOM-75
324:μCOM-47
318:μCOM-47
311:μCOM-46
307:μCOM-45
303:μCOM-44
299:μCOM-43
297:). The
289:), and
275:μCOM-43
258:μCOM-42
252:μCOM-42
228:μCOM-41
222:μCOM-41
66:clone.
60:NEC V20
1304:Places
1278:People
1021:Avaloq
1009:Avaloq
358:μCOM-8
352:μCOM-8
309:, and
245:μPD543
239:μPD542
215:μPD758
209:μPD757
203:μPD752
196:μCOM-4
190:μCOM-4
1320:Other
1252:N343i
1215:R4200
1142:(34%)
1134:(34%)
1121:(25%)
1105:(40%)
691:(PDF)
684:(PDF)
417:TK-80
161:Sharp
62:, an
1380:Sold
1247:e616
1235:V850
1113:(7%)
625:DRAM
615:The
595:The
550:The
534:and
522:The
506:The
492:8048
470:Sega
442:ZX81
438:ZX80
428:The
400:CALL
391:The
372:The
356:The
338:The
328:NMOS
322:The
291:CMOS
283:NMOS
279:PMOS
273:The
262:PMOS
256:The
232:PMOS
226:The
194:The
177:and
168:μCOM
50:and
38:and
30:The
1230:V60
1225:V25
1220:V20
1195:78K
1026:KMD
954:NEC
569:ALU
472:'s
450:MSX
404:RST
179:78K
44:NEC
1443::
992:UK
877:^
845:^
811:^
785:^
747:^
715:^
672:^
639:^
582:.
542:.
460:,
456:,
440:,
305:,
301:,
159:.
946:e
939:t
932:v
897:.
871:.
839:.
805:.
779:.
741:.
700:.
657:.
20:)
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