58:
840:
911:
852:
50:
698:, released in 1979, used the 8021 in its keyboard. The 8021 processor scans the key matrix, converts switch closures to an 8-bit code and then transmits that code serially to the keyboard interface on the main system. It will also accept commands to turn indicator LEDs on or off. The 8021 was also used in the keyboards for the TRS-80 Model 12, 12B, 16, 16B and the Tandy 6000/6000HD.
867:
31:
896:
42:
545:
690:
The MCS-48 series was commonly used in computer and terminal keyboards, converting key presses into protocols that can be understood by digital circuits. This also allows the possibility of serial communication, reducing the amount of conductors needed in cables on external keyboards. Microprocessors
280:
series, it remained quite popular even by the year 2000 due to its low cost, wide availability, memory-efficient one-byte instruction set, and mature development tools. Because of this, it is used in high-volume, cost-sensitive consumer electronics devices such as TV remotes, computer keyboards, and
882:
951:
329:. Some 70% of instructions are single byte and single cycle ones, but 30% need two cycles or two bytes, so its typical performance would be closer to 0.5 MIPS.
2241:
811:) owned a license to produce this series and developed their MAB8400-family based on this architecture. These were the first microcontrollers with an integrated
691:
had been used in keyboards since at least 1972, simplifying earlier discrete designs. The 8048 has been used in this application since its introduction in 1978.
839:
1375:
1458:
895:
1127:
1343:
1184:
789:
used the closely related Intel 8049 to manage its keyboard, joystick ports, RS-232 inputs and audio. The ROM-less 8035 variant was used in
1266:
910:
243:
1860:
1003:
317:
block divides the clock input frequency by three and then further divides the result into five machine states. Using the 11
2246:
2182:
2164:
1368:
851:
2194:
1451:
960:
2215:
254:
1253:
1559:
1481:
930:
326:
57:
1019:
53:
An Intel 8049 microcontroller, as used in a HP3478A multimeter. This chip was manufactured in the second week of 1984.
950:
Laws, David; Blume Jr., Henry; Ekiss, John; Feng, Yung; Kline, Barbara; Raphael, Howard; Stamm, David (2008-07-30).
2177:
1878:
1361:
1991:
1604:
1486:
1444:
795:
1333:
1287:
1228:
866:
710:
62:
2220:
1519:
322:
872:
238:. The 8048 is arguably the most prominent member of the family. Initially, this family was produced using
2062:
2056:
1915:
1504:
314:
2172:
2137:
2096:
2091:
2086:
2080:
2074:
2068:
1703:
1539:
1524:
1384:
760:
306:
262:
779:
2187:
2131:
1949:
1812:
1718:
1659:
1134:
857:
1105:
1966:
808:
782:
763:
887:
1529:
1496:
999:
881:
1159:
2112:
2011:
1981:
1842:
1782:
1778:
1765:
775:
294:
258:
250:
technology. It was manufactured into the 1990s to support older designs that still used it.
49:
2210:
2143:
2019:
1855:
1642:
1637:
1632:
1619:
1568:
1514:
1467:
1337:
706:
702:
695:
219:
186:
35:
1348:
1937:
1674:
1652:
1589:
1300:
752:
except by being reset). Later PC compatibles integrate the 8042's functions into their
745:
2235:
1647:
1627:
1425:
1410:
1405:
953:
Oral
History Panel on the Development and Promotion of the Intel 8048 Microcontroller
832:
270:
2024:
2001:
1976:
1942:
1895:
1888:
1863:
1827:
1753:
1696:
1599:
1420:
1400:
771:
767:
548:
Intel P8242 - keyboard controller with
Phoenix firmware for AT-compatible computers
310:
277:
266:
226:'s first microcontroller, was originally released in 1976. Its first members were
1214:
1905:
1850:
1832:
1797:
1792:
1787:
1748:
1723:
1328:
786:
741:
737:
719:
1910:
1773:
1743:
1691:
1669:
1664:
1576:
1509:
1415:
714:
239:
181:
30:
205:
Note: All other programmer-visible registers and stack are allocated in RAM.
2123:
1996:
1922:
1807:
1802:
1738:
1713:
1534:
1353:
916:
824:
753:
749:
318:
41:
1609:
1020:"UPI-41AH/42AH Universal Peripheral Interface 8-bit Slave Microcontroller"
301:) that can be replaced with a 4 KB external ROM, as well as 128
17:
1733:
820:
790:
733:
544:
276:
Though the MCS-48 series was eventually replaced by the very successful
2029:
1954:
1873:
901:
816:
510:
4K program memory expandable, 2× 8-bit timers, 27× I/O ports
1344:
Computer
History Museum, Intel 8048 Microcontroller Oral History Panel
740:
CPU and could be commanded by software to reset the 80286 (unlike the
732:. As well as managing the keyboard interface, the 8042 controlled the
1971:
1959:
1581:
1544:
812:
1436:
1094:, Personal Computer Hardware Reference Library, IBM, September 1985
1075:, Personal Computer Hardware Reference Library (Revised ed.),
1932:
1900:
1883:
1868:
1594:
543:
298:
223:
56:
48:
40:
29:
2117:
1986:
1927:
1822:
1728:
1708:
302:
247:
1440:
1357:
1817:
1681:
1549:
1076:
1302:
Microprocessor
Peripherals UPI-41A/41AH/42/42AH User's Manual
744:
and later processors, the 80286 had no way of switching from
1239:. Intel Corporation. August 1979. Application Note AP-55A.
1229:"Serial I/O and Math Utilities for the 8049 Microcomputer"
998:. McGraw-Hill International Book Company. pp. 57–59.
1209:(Applications Seminar Notebook). Intel Corporation. 1978.
246:) technology. In the early 1980s, it became available in
1237:
A High-Speed
Emulator for Intel MCS-48 Microcomputers
651:
UPI, preprogrammed with keyboard controller firmware
1349:
Microcontroller NEC 8741 (image of the
Silicon-Chip)
2203:
2157:
2105:
2049:
2042:
2010:
1841:
1764:
1618:
1567:
1558:
1495:
1474:
976:
321:maximum crystal frequency will produce 0.73
717:peripheral interface chip at I/O port addresses
1244:Dahm, Phil; Rosenberg, Stuart (December 1979).
724:with an 8042 accessible through port addresses
538:Has piggy-back socket for 2758/2716/2732 EPROM
1308:. Intel Corporation. October 1993. 231318-006.
1248:. Intel Corporation. Reliability Report RR-25.
1452:
1369:
989:
987:
985:
8:
1317:. Intel Corporation. Application Note AP-90.
1231:. Intel Corporation. Application Note AP-49.
1227:Smith, Lionel; Moore, Cecil (January 1979).
361:subset of 8048, 20 pins, only 13 I/O lines
2046:
1564:
1459:
1445:
1437:
1376:
1362:
1354:
1315:An 8741A/8041A Digital Cassette Controller
1160:"The History Of Roland, Part 1: 1930–1978"
1044:TRS-80 Model II Technical Reference Manual
261:and 64 to 256 bytes of internal (on-chip)
1246:Intel MCS-48 and UPI-41A Microcontrollers
1092:Technical Reference: Personal Computer AT
524:2× 8-bit timers, 27× I/O ports
551:
331:
1274:. Intel. 1991. Order number 270645-003.
1261:. Intel. 1984. Order number 210918-002.
1060:. Tandy/Radio Shack. 1985. p. 213.
942:
829:
2242:Computer-related introductions in 1976
1313:Beaston, Johan; Kahn, Jim (May 1980).
1073:Technical Reference: Personal Computer
996:Computer Architecture and Organization
815:-interface and were used in the first
375:subset of 8048, 28 pins, 21 I/O lines
67:
1207:MCS-48 Single Component Microcomputer
845:Kvazar Kiev KM1816VE48 (Soviet Union)
581:Universal Peripheral Interface (UPI)
7:
273:, separate from programs and data.
257:, with internal or external program
1216:MCS-48 Microcomputer User's Manual
799:to generate the background music.
25:
2081:High voltage parallel programming
1295:. Order number 9800504-02 Rev. B.
1025:. Intel. November 1994. p. 2
679:UPI, OTP EPROM version of 8042AH
623:UPI, OTP EPROM version of 8041AH
1058:Tandy 6000/6000HD Service Manual
909:
894:
880:
865:
850:
838:
27:Family of 8-bit microcontrollers
2165:List of common microcontrollers
2075:High-voltage serial programming
553:Universal Peripheral Interface
2195:List of Wi-Fi microcontrollers
389:subset of 8048, A/D-converter
1:
2216:Programmable logic controller
2057:In-circuit serial programming
1158:Gordon Reid (November 2004).
1128:"Korg Poly-61 Service Manual"
1106:"Korg Trident Service Manual"
736:gating function for the AT's
705:used an 8048 as its internal
313:ports. The microcontroller's
255:modified Harvard architecture
1482:Single-board microcontroller
1340: (archived 17 July 2014)
807:Philips Semiconductors (now
2069:Program and Debug Interface
1090:"Section 1: System Board",
1046:. Radio Shack. p. 135.
609:UPI, EPROM version of 8041
2263:
1329:MCS-48 family architecture
1268:8-Bit Embedded Controllers
1222:. Intel Corporation. 1978.
204:
170:
155:
134:
1487:Special function register
1391:
1385:Microcontrollers by Intel
1166:. Sound On Sound Magazine
759:The 8048 was used in the
244:metal–oxide–semiconductor
199:
177:
144:
141:
1255:Microcontroller Handbook
803:Derived microcontrollers
293:has 2 KB of masked
253:The MCS-48 series has a
2221:List of microprocessors
2118:Joint Test Action Group
1334:Coprolite 8048 Projects
1071:"Section 4: Keyboard",
994:Hayes, John P. (1978).
297:(the 8748 and 8749 had
269:is mapped into its own
2247:Intel microcontrollers
1426:MCS-296 (8x296 family)
1411:MCS-251 (80251 family)
1406:MCS-151 (80151 family)
1187:Philips MAB8400-Family
1116:– via Synthfool.
977:Intel Corporation 1978
873:National Semiconductor
694:The Tandy/Radio Shack
549:
65:
54:
46:
45:The 8749 with UV EPROM
38:
2063:In-system programming
1421:MCS-96 (8x196 family)
1289:UPI-41A User's Manual
1164:The History Of Roland
547:
69:Intel 8048 registers
60:
52:
44:
33:
2132:In-circuit debugging
1401:MCS-51 (8051 family)
1396:MCS-48 (8048 family)
825:Compact Disc players
2188:Renesas Electronics
2138:In-circuit emulator
858:Mitsubishi Electric
827:(e.g. the CD-100).
783:analog synthesizers
665:UPI, EPROM version
554:
469:27× I/O ports
455:27× I/O ports
334:
172:Program Status Word
70:
764:video game console
713:replaced the PC's
552:
550:
496:Factory OTP EPROM
332:
68:
66:
55:
47:
39:
2229:
2228:
2153:
2152:
2038:
2037:
1719:PIC10/12/16/17/18
1434:
1433:
1108:. Korg. p. 4
761:Magnavox Odyssey²
683:
682:
542:
541:
213:
212:
209:
208:
16:(Redirected from
2254:
2169:By manufacturer
2113:Nexus (standard)
2047:
1565:
1468:Microcontrollers
1461:
1454:
1447:
1438:
1378:
1371:
1364:
1355:
1318:
1309:
1307:
1296:
1294:
1275:
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1262:
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1249:
1240:
1232:
1223:
1221:
1210:
1188:
1182:
1176:
1175:
1173:
1171:
1155:
1149:
1148:
1146:
1145:
1139:
1133:. Archived from
1132:
1124:
1118:
1117:
1115:
1113:
1102:
1096:
1095:
1087:
1081:
1080:
1068:
1062:
1061:
1054:
1048:
1047:
1040:
1034:
1033:
1031:
1030:
1024:
1016:
1010:
1009:
991:
980:
974:
968:
967:
965:
959:. Archived from
958:
947:
913:
898:
884:
869:
854:
842:
776:Roland Jupiter-4
770:series, and the
731:
727:
723:
673:2K × 8 OTP EPROM
617:1K × 8 OTP EPROM
555:
490:1K × 8 OTP EPROM
335:
333:Microcontroller
325:of single-cycle
75:
74:
71:
21:
2262:
2261:
2257:
2256:
2255:
2253:
2252:
2251:
2232:
2231:
2230:
2225:
2211:Embedded system
2199:
2149:
2144:In-target probe
2101:
2034:
2006:
1837:
1760:
1614:
1554:
1491:
1470:
1465:
1435:
1430:
1387:
1382:
1338:Wayback Machine
1325:
1312:
1305:
1299:
1292:
1285:
1271:
1265:
1258:
1252:
1243:
1235:
1226:
1219:
1213:
1205:
1197:
1192:
1191:
1185:Datasheet (pdf)
1183:
1179:
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1157:
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1125:
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1042:
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1037:
1028:
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1013:
1006:
993:
992:
983:
975:
971:
963:
956:
949:
948:
944:
939:
931:HSE-49 emulator
927:
920:
914:
905:
899:
890:
885:
876:
870:
861:
855:
846:
843:
805:
793:'s arcade game
729:
725:
718:
707:microcontroller
703:IBM PC keyboard
696:TRS-80 Model II
688:
532:ext. ROM socket
287:
220:microcontroller
125:
120:
115:
110:
105:
100:
95:
90:
85:
80:
36:microcontroller
28:
23:
22:
15:
12:
11:
5:
2260:
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2250:
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2014:
2008:
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2004:
1999:
1994:
1989:
1984:
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1324:
1323:External links
1321:
1320:
1319:
1310:
1297:
1286:Intel (1980).
1282:
1281:
1277:
1276:
1263:
1250:
1241:
1233:
1224:
1211:
1202:
1201:
1196:
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1177:
1150:
1119:
1097:
1082:
1063:
1049:
1035:
1011:
1004:
981:
969:
966:on 2014-12-27.
941:
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886:
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871:
864:
862:
856:
849:
847:
844:
837:
835:
833:second sources
804:
801:
780:Roland ProMars
746:protected mode
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146:
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139:
138:
136:Main registers
132:
131:
129:(bit position)
126:
123:
121:
118:
116:
113:
111:
108:
106:
103:
101:
98:
96:
93:
91:
88:
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81:
78:
26:
24:
14:
13:
10:
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6:
4:
3:
2:
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2240:
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2214:
2212:
2209:
2208:
2206:
2202:
2196:
2193:
2189:
2186:
2184:
2181:
2179:
2178:NXP/Freescale
2176:
2174:
2171:
2170:
2168:
2166:
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2160:
2156:
2145:
2142:
2139:
2136:
2133:
2130:
2125:
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2121:
2119:
2116:
2114:
2111:
2110:
2108:
2104:
2098:
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2079:
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1497:Architectures
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1140:on 2010-06-02
1136:
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1005:0-07-027363-4
1001:
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888:NEC μPD8749HD
883:
878:
874:
868:
863:
859:
853:
848:
841:
836:
834:
831:Intel MCS-48
830:
828:
826:
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818:
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788:
784:
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701:The original
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271:address space
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43:
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19:
2025:ARM Cortex-R
1896:ARM Cortex-R
1686:
1395:
1314:
1301:
1288:
1267:
1254:
1245:
1236:
1215:
1206:
1195:Bibliography
1180:
1168:. Retrieved
1163:
1153:
1142:. Retrieved
1135:the original
1122:
1110:. Retrieved
1100:
1091:
1085:
1079:, April 1984
1072:
1066:
1057:
1052:
1043:
1038:
1027:. Retrieved
1014:
995:
972:
961:the original
952:
945:
806:
794:
772:Korg Poly-61
768:Korg Trident
758:
700:
693:
689:
659:2K × 8 EPROM
603:1K × 8 EPROM
518:2K × 8 EPROM
504:1K × 8 EPROM
327:instructions
309:and 27
290:
288:
275:
252:
235:
231:
227:
216:
214:
171:
163:
162:rogram
159:
148:
135:
128:
2050:Programming
1813:PIC24/dsPIC
1749:Rabbit 2000
1560:Word length
1170:29 November
1112:10 February
860:M5M80C39P-6
823:in the US)
796:Donkey Kong
787:Sinclair QL
738:Intel 80286
676:256 × 8 RAM
662:128 × 8 RAM
648:256 × 8 RAM
634:256 × 8 RAM
620:128 × 8 RAM
592:128 × 8 RAM
535:256 × 8 RAM
521:128 × 8 RAM
480:256 × 8 RAM
466:128 × 8 RAM
439:256 × 8 RAM
426:128 × 8 RAM
151:ccumulator
61:Intel 8749
34:Intel 8048
2236:Categories
2087:Bootloader
2043:Interfaces
1144:2013-03-07
1029:2022-07-19
937:References
715:Intel 8255
645:2K × 8 ROM
631:2K × 8 ROM
606:64 × 8 RAM
589:1K × 8 ROM
578:64 × 8 RAM
575:1K × 8 ROM
507:64 × 8 RAM
493:64 × 8 RAM
477:4K x 8 ROM
463:2K × 8 ROM
452:64 × 8 RAM
449:1K × 8 ROM
413:64 × 8 RAM
400:64 × 8 RAM
386:64 × 8 RAM
383:2K × 8 ROM
372:64 × 8 RAM
369:1K × 8 ROM
358:64 × 8 RAM
355:1K × 8 ROM
315:oscillator
18:Intel 8042
2124:debugWIRE
2106:Debugging
2030:PowerPC64
1967:Propeller
1675:MELPS 740
917:Signetics
904:MAF 8049H
875:NS87PC48D
756:devices.
754:super I/O
750:real mode
2204:See also
2183:Infineon
1977:TLCS-900
1943:ColdFire
1864:Cortex-M
1828:TLCS-900
1754:TLCS-870
925:See also
919:SCN8048A
821:Magnavox
791:Nintendo
748:back to
734:A20 line
567:Remarks
561:Internal
347:Remarks
341:Internal
285:Variants
242:(n-type
222:series,
2126:(Atmel)
2120:(JTAG)
1982:TriCore
1955:PowerPC
1851:Am29000
1724:ST6/ST7
1605:TMS1000
1600:TLCS-47
1336:at the
902:Philips
817:Philips
178:
166:ounter
142:
2083:(HVPP)
2077:(HVSP)
2059:(ICSP)
2012:64-bit
2002:Z80000
1997:Xtensa
1972:SuperH
1960:MPC5xx
1843:32-bit
1808:MSP430
1798:CR16/C
1779:68HC12
1774:65C816
1766:16-bit
1670:65C265
1665:65C134
1643:68HC11
1638:68HC08
1633:68HC05
1610:μCOM-4
1582:COP400
1577:Am2900
1545:RISC-V
1535:MPS430
1280:UPI-41
1200:MCS-48
1002:
785:. The
766:, the
709:. The
670:8742AH
628:8042AH
614:8741AH
586:8041AH
564:Memory
558:Device
344:Memory
338:Device
281:toys.
278:MCS-51
265:. The
217:MCS-48
200:Stack
2173:Intel
2158:Lists
2146:(ITP)
2140:(ICE)
2134:(ICD)
2097:aWire
2071:(PDI)
2065:(ISP)
1950:PIC32
1938:68000
1933:MN103
1901:AVR32
1884:STM32
1869:EFM32
1833:Z8000
1788:80186
1697:XC800
1620:8-bit
1595:S1C6x
1590:PPS-4
1586:MARC4
1569:4-bit
1505:68000
1306:(PDF)
1293:(PDF)
1272:(PDF)
1259:(PDF)
1220:(PDF)
1138:(PDF)
1131:(PDF)
1023:(PDF)
964:(PDF)
957:(PDF)
742:80386
722:60–63
711:PC AT
600:8741A
529:87P50
303:bytes
299:EPROM
224:Intel
1987:V850
1928:M32R
1923:H8SX
1916:FR-V
1823:RL78
1793:C166
1744:eZ80
1729:STM8
1709:COP8
1692:8051
1687:8048
1660:6502
1653:RS08
1628:6800
1530:MIPS
1510:8051
1475:Main
1416:8061
1172:2010
1114:2018
1000:ISBN
778:and
730:0x64
728:and
726:0x60
686:Uses
656:8742
642:8242
637:UPI
595:UPI
572:8041
515:8749
501:8748
487:8648
474:8050
460:8049
446:8048
436:none
433:8040
423:none
420:8039
410:none
407:8038
397:none
394:8035
380:8022
366:8021
352:8020
323:MIPS
291:8049
289:The
248:CMOS
240:NMOS
236:8748
234:and
232:8035
228:8048
215:The
2092:ROM
2020:ARC
1906:CRX
1889:XMC
1879:SAM
1874:LPC
1861:ARM
1856:ARC
1818:R8C
1803:H8S
1739:Z80
1704:AVR
1682:78K
1648:S08
1550:x86
1540:PIC
1525:AVR
1520:ARM
1515:ARC
1077:IBM
813:I²C
809:NXP
319:MHz
311:I/O
307:RAM
305:of
295:ROM
267:I/O
263:RAM
259:ROM
194:BS
191:FO
156:PC
63:die
2238::
1992:RX
1911:FR
1783:16
1734:Z8
1714:H8
1162:.
984:^
774:,
720:0x
230:,
197:1
187:AC
182:CY
145:A
1781:/
1460:e
1453:t
1446:v
1377:e
1370:t
1363:v
1174:.
1147:.
1032:.
1008:.
979:.
819:(
164:C
160:P
149:A
124:0
119:1
114:2
109:3
104:4
99:5
94:6
89:7
84:8
79:9
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
