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PPS-4/2 (11660) - Rockwell International
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Rockwell PPS-4/2
Rockwell PPS4 11660 CPU.jpg
PPS4/2 part 11660EC, week 22, 1979
General Info
DesignerRockwell International
ManufacturerRockwell International
Model NumberPPS-4/2
Part Number11660
IntroductionOctober, 1975 (launched)
General Specs
Frequency198.864 kHz
Process10 μm
Word Size4 bit
Max Memory2 KiB
Max Address Mem4 KiB
TDP600 mW
OP Temperature0 °C – 70 °C

The PPS-4/2 (also known by its part number 11660) was a 4-bit microprocessor designed by Rockwell International and first produced at the 3rd quarter of 1975. The PPS-4 is part of the PPS-4 Family. The PPS-4/2 is the 2nd model from the PPS-4 family. The "/2" was used to indicate that this chip is a two-chip system; Rockwell incorporated the 10706 clock generator internally. It's full compatible with all the original PPS-4 CPU and all the other parts.

THe PPS-4/2 is functionally identical to the PPS-4. It can, however, directly drive low-power LED display.


Manufacturer Model Package
Rockwell PPS-4/2 White ceramic, 42-pin QUIP
Rockwell PPS-4/2 Black plastic, 42-pin QUIP

Instruction set[edit]

Main article: PPS-4 Instruction Set
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See also[edit]

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base frequency0.199 MHz (1.98864e-4 GHz, 198.864 kHz) +
designerRockwell International +
familyPPS-4 +
first launchedOctober 1975 +
full page namerockwell international/pps-4/11660 +
instance ofmicroprocessor +
ldateOctober 1975 +
main imageFile:Rockwell PPS4 11660 CPU.jpg +
main image captionPPS4/2 part 11660EC, week 22, 1979 +
manufacturerRockwell International +
max memory0.00195 MiB (2 KiB, 2,048 B, 1.907349e-6 GiB, 1.862645e-9 TiB) +
max memory address4 KiB +
max operating temperature70 °C +
microarchitecturePPS-4 +
min operating temperature0 °C +
model numberPPS-4/2 +
nameRockwell PPS-4/2 +
part number11660 +
process10,000 nm (10 μm, 0.01 mm) +
tdp0.6 W (600 mW, 8.046e-4 hp, 6.0e-4 kW) +
word size4 bit (0.5 octets, 1 nibbles) +