COP400
The COP400 or COP II is a 4-bit microcontroller family introduced in 1977 by National Semiconductor as a follow-on product to their original PMOS COP microcontroller. COP400 family members are complete microcomputers containing internal timing, logic, ROM, RAM, and I/O necessary to implement dedicated controllers. Some COP400 devices were second-sourced by Western Digital as the WD4200 family. In the Soviet Union several COP400 microcontrollers were manufactured as the 1820 series (e.g. the COP402 with designation КР1820ВЕ1).
National Semiconductor COP420 in 28-pin plastic DIP. Late 1982 date code. | |
| General information | |
|---|---|
| Launched | 1977 |
| Common manufacturer(s) |
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| Performance | |
| Max. CPU clock rate | to 250 KHz |
| Data width | 4 (RAM), 8 (ROM) |
| Address width | 7 (RAM), 11 (ROM) |
| Architecture and classification | |
| Application | Embedded |
| Instruction set | COP400 |
| Number of instructions | 40 |
| Physical specifications | |
| Package(s) |
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| History | |
| Predecessor(s) | MM5799 (PMOS COP) |
| Successor(s) | COP8 |
The COP400 is implemented in CMOS or N-channel silicon gate MOS technology. It was typically packaged in 24- or 28-pin DIP packages. Instruction cycle time of the faster family members is 4 microseconds. The COP400 family offered several memory and pinout configurations.
Notable products that used COP400-family chips include the Apple Lisa, Milton Bradley and Mattel electronic games, Coleco Head to Head Basketball, the Grundy Newbrain, and others.