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| package          = QIL42
 
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The '''PPS-4''' (Parallel Processing System - 4-bit word) was a [[microprocessor family|family]] of {{arch|4}} [[microprocessor]] chips designed by [[Rockwell International]] and introduce in 3rd quarter of [[1972]].
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The '''PPS-4''' (Parallel Processing System - 4-bit word) was a [[microprocessor family|family]] of {{arch|4}} [[microprocessor]] chips designed by [[Rockwell International]] and introduce in 3rd quarter of 1972.
  
 
The original PPS-4 chipset was designed to provide complete functionality in three chips - [[CPU]], [[program memory]], and a [[clock generator]]. A later version known as the {{\|11660|PPS-4/2}} ("/2" denoting a two-chip system) eliminated the external clock generator chip by incorporating it internally. A third variation known as the {{rockwell|PPS-4/1}} ("/1" being a single-chip microcomputer) was actually a [[microcontroller]], including the program memory internally.
 
The original PPS-4 chipset was designed to provide complete functionality in three chips - [[CPU]], [[program memory]], and a [[clock generator]]. A later version known as the {{\|11660|PPS-4/2}} ("/2" denoting a two-chip system) eliminated the external clock generator chip by incorporating it internally. A third variation known as the {{rockwell|PPS-4/1}} ("/1" being a single-chip microcomputer) was actually a [[microcontroller]], including the program memory internally.

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designerRockwell International +
full page namerockwell international/pps-4 +
instance ofintegrated circuit family +
main designerRockwell International +
manufacturerRockwell International +
nameRockwell PPS-4 +
packageQIL42 +
technologypMOS +
word size4 bit (0.5 octets, 1 nibbles) +