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S2000 - AMI
< american microsystems
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The AMI S2000 series is a family of 4-bit microcontrollers developed by American Microsystems in late 1979[off?]. The chips came with 52/59 instructions - all single-cycle - operating at 4.5μs.

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Part Description
S2000 1k x 8-bit ROM, 64x4-bit RAM, 51 instructions
S2150 1.5k x 8-bit ROM, 80x4-bit RAM, 51 instructions
S2200 2k x 8-bit ROM, 128x4-bit RAM, 59 instructions
S2400 4k x 8-bit ROM, 128x4-bit RAM, 59 instructions
S2000A Identical to S2000 VFD driver support/high voltage support
S2150A Identical to S2150 VFD driver support/high voltage support
S2200A Identical to S2200 VFD driver support/high voltage support
S2400A Identical to S2400 VFD driver support/high voltage support
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