The Western Digital CR1872 is a family of single-chip 4-bit microcontrollers developed by Western Digital and introduce in late 1977.

Family Members
Part	Description
CR1872	32x4-bit RAM, 512x10-bit ROM
CR2272 (WD40)	32x4-bit RAM, 512x10-bit ROM, LED driver, DIL-40
CR2872	32x4-bit RAM, DIL-64 (ROM-less/development chip)

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