 National Semiconductor COP420 in 28-pin plastic DIP. Late 1982 date code. | |
| General information | |
|---|---|
| Launched | 1977 |
| Common manufacturer | |
| 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 |
|
| History | |
| Predecessor | MM5799 (PMOS COP) |
| Successor | COP8 |
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.[1] COP400 family members are complete microcomputers containing internal timing, logic, ROM, RAM, and I/O necessary to implement dedicated controllers.[2] Some COP400 devices were second-sourced by Western Digital as the WD4200 family.[3][4] In the Soviet Union several COP400 microcontrollers were manufactured as the 1820 series (e.g. the COP402 with designation КР1820ВЕ1).[5]
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.
- ^ "National Semiconductor: The COP before the COPS". The CPUSHACK Museum. 27 September 2014. Retrieved 23 December 2021.
- ^ "COP400 Microcontroller Family COPS Family User's Guide". National Semiconductor. Retrieved 3 August 2023.
- ^ "Western Digital and the COP". The CPUSHACK Museum. 2 October 2015. Retrieved 22 December 2021.
- ^ "WD4200/WD4210 Single-Chip N-Channel Microcontroilers". Retrieved 23 December 2021.
- ^ "Soviet microprocessors, microcontrollers, FPU chips and their western analogs". www.cpu-world.com. Retrieved 15 November 2022.