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| {{Architecture sizes}} | | {{Architecture sizes}} |
− | The '''4-bit [[architecture]]''' is a [[microprocessor]] or [[computer]] architecture that has a [[datapath]] width or a highest [[operand]] width of 4 bits or a [[nibble]]. These architectures typically have a matching [[register file]] with [[registers]] width of 4 bits and 4-8-bit wide addresses. | + | The '''4-bit''' [[computer architecture]] is a [[microprocessor]] architecture that has a [[datapath]] width or a highest [[operand]] width of 4 bits or a [[nibble]]. These architectures typically have a matching [[register file]] with [[registers]] width of 4 bits. |
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| == Industry == | | == Industry == |
− | Most of the first [[microprocessor]]s during the early 1970s had 4-bit [[word]] sizes. Both the Intel {{intel|4004}}, the first commercial microprocessor, and the {{intel|4040}} had a 4-bit word length, but had {{arch|8}} instructions. Some of the first [[microcontroller]]s such as the {{ti|TMS1000}} made by [[Texas Instruments]] and NEC's {{nec|μPD751}} also had 4-bit words. 4-bit word were proven to be very limiting and by 1974 there was a shift to larger architectures such as {{arch|8|8-}} and {{arch|12|12-}} bit architectures. | + | Most of the first [[microprocessor]]s during the early 1970s had 4-bit [[word]] length. Both the Intel[[Intel 4004|4004]] and the [[Intel 4040|4040]] were 4-bits. The world's first single-chip microprocessor by Texas Instruments, the [[TMS1000]], was also a 4-bit CPU. 4-bit word were proven to be very limiting and by 1974 there was a shift to larger architectures such as [[8-bit architecture|8-]] and [[12-bit architecture]] architectures. |
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− | In the [[microcontroller]] domain, the story is a little different. 4-bit microcontrollers found their way into many battery-powered and low power instruments and devices. Some 4-bit chips such as the {{atmel|MARC4|Atmel MARC4}} continued to be manufactured until very recently (2010s), those devices aimed directly at wireless devices such as RFID-related applications. Other 4-bit MCUs are still made to date such as the [[Epson]]'s {{epson|S1C60}} and {{epson|S1C63}} MCU [[microprocessor family|families]]. Modern 4-bit microprocessors, however, are much different from the first generation microprocessors of the 1970s - in terms of architecture, performance, and overall capabilities.
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| == Applications == | | == Applications == |
− | Most of the early 4-bit [[microprocessor]]s were used almost exclusively in calculators and toys, later on for various utilities, video games, controllers, and early computers. 4 bits was a logical choice for many calculators that used [[binary coded decimal|BDC]] numbers representation. | + | Most 4-bit [[microprocessor]]s were used almost exclusively in calculators and toys. |
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− | Today, 4-bit chips such as {{epson|S1C60|S1C60 family}} are still manufactured are used in many low-power devices, wireless tools, and [[internet of things]]. Until recently Atmel's {{atmel|MARC4}} was also a large player in the low-power RF/IR wireless market.
| + | == 4-bit microprocessor == |
− | | + | * [[Intel 4004]] |
− | == 4-bit microprocessors ==
| + | * [[Intel 4040]] |
− | * {{amd|Am2900|AMD Am2900}} | + | * [[AMI 9209]] |
− | * {{ami|9209|AMI 9209}} | + | * [[Hitachi HD35404]] |
− | * {{fairchild|4700|Fairchild 4700}} | + | * [[National IMP-4]] |
− | * {{fairchild|9400|Fairchild 9400}} | + | * [[Fairchild PPS-25]] |
− | * {{fairchild|PPS-25|Fairchild PPS-25}} | + | * [[Rockwell PPS-4]]/1 |
| + | * [[Rockwell PPS-4/2]] |
| + | * [[Toshiba T3472]] |
| + | * [[TMS1000]] |
| + | * [[NEC μCOM 4]] |
| + | * [[NEC μCOM 41]] |
| * [[HP Saturn]] (64-bit register, 4-bit data path) | | * [[HP Saturn]] (64-bit register, 4-bit data path) |
− | * {{intel|4004|Intel 4004}} ({{hitachi|hmcs-4/hd35404|HD35404}})
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− | * {{intel|4040|Intel 4040}}
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− | * {{motorola|10800|Motorola 10800}}
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− | * {{national|IMP-4|National IMP-4}}
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− | * {{rockwell|PPS-4|Rockwell PPS-4}}
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| == 4-bit microcontrollers == | | == 4-bit microcontrollers == |
− | * {{atmel|MARC4|Atmel MARC4}} | + | * [[MARC4]] |
− | * {{ami|S2000|AMI S2000}} | + | * [[TLCS-47]] |
− | * {{epson|S1C60|Epson S1C60}}
| + | * [[NEC μPD75X]] |
− | * {{epson|S1C63|Epson S1C63}}
| + | * [[NEC µPD612X]] |
− | * {{fujitsu|MB88200|Fujitsu MB88200}}
| + | * [[NEC µPD172XX]] |
− | * {{fujitsu|MB8840|Fujitsu MB8840}}/{{fujitsu|MB88400|400}}
| + | * [[Epson S1C63]] |
− | * {{fujitsu|MB8850|Fujitsu MB8850}}/{{fujitsu|MB88500|500}}
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− | * {{hitachi|HD404720|Hitachi HD404720}}
| + | == 4-bit discrete chips == |
− | * {{hitachi|HMCS40|Hitachi HMCS40}}
| + | * [[AMD Am2900]], a family of 4-bit bit slice chips |
− | * {{hitachi|HMCS400|Hitachi HMCS400}}
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− | * {{itt|7150|ITT 7150}}
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− | * {{matsushita|MN1400|Matsushita MN1400}}
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− | * {{matsushita|MN1500|Matsushita MN1500}}
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− | * {{matsushita|MN1700|Matsushita MN1700}}
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− | * {{mitsu|MELPS 4|Mitsubishi MELPS 4}}
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− | * {{mitsu|M50430|Mitsubishi M50430}}/{{mitsu|M50440|440}}
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− | * {{mitsu|M50460|Mitsubishi M50460}}/{{mitsu|M50560|560}}
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− | * {{mitsu|M5072|Mitsubishi M5072}}/{{mitsu|M5076|M5076}}
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− | * {{mitsu|M5090|Mitsubishi M5090}}
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− | * {{mmi|5700|MMI 5700}}
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− | * {{national|MAPS|National MAPS}}
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− | * {{national|COPS I|National COPS I}}
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− | * {{national|COPS II|National COPS II}}
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− | * {{nec|17K|NEC 17K}}
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− | * {{nec|μCOM-4|NEC μCOM-4}}
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− | * {{nec|μPD751|NEC μPD751}}
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− | * {{nec|μPD707|NEC μPD707}}
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− | * {{nec|μPD7500|NEC μPD7500}}
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− | * {{nec|μPD75000|NEC μPD75000}}
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− | * {{oki|OLMS-40|OKI OLMS-40}}/{{oki|OLMS-50|50}}/{{oki|OLMS-60|60}}/{{oki|OLMS-64|64}}/{{oki|OLMS-65|65}}
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− | * {{oki|OLMS-63K|OKI OLMS-63K}}
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− | * {{oki|OLMS-64K|OKI OLMS-64K}}
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− | * {{rockwell|PPS-4-1|Rockwell PPS-4/1}}
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− | * [[Sanyo LC65]] | |
− | * [[Sanyo 66xx]] | |
− | * [[Sanyo LM64xx]] | |
− | * {{sharp|SM|Sharp SM}}
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− | * [[Sony SPC500]] | |
− | * {{ti|TMS1000|TI TMS1000}}
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− | * {{toshiba|T3400|Toshiba T3400}}
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− | * {{toshiba|TLCS-42|Toshiba TLCS-42}}
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− | * {{toshiba|TLCS-43|Toshiba TLCS-43}} | |
− | * {{toshiba|TLCS-46A|Toshiba TLCS-46A}}
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− | * {{toshiba|TLCS-47|Toshiba TLCS-47}}
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− | * {{toshiba|TLCS-470|Toshiba TLCS-470}}
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− | * {{wd|CR1872 series|WD CR1872}}
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− | * {{wd|WD4200|WD WD4200}}
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− | * {{bell|BELLMAC-4|Bell Labs BELLMAC-4}}
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| [[Category:4-bit microprocessors]] | | [[Category:4-bit microprocessors]] |