Semiconductor & Computer Engineering
| National COP400 | |
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| Developer | National Semiconductor |
| Manufacturer | National Semiconductor |
| Type | microcontrollers |
| Production | 1977 |
| ISA | COP400 |
| Word size | 4 bit 0.5 octets
1 nibbles |
| Technology | nMOS, CMOS |
| Clock | 4.098 kHz-500 kHz |
| Package | DIP16, DIP20, DIP24, DIP28, DIP40 |
The COP400 or COPS II or simply COPS (Controller Oriented Processor System II) was a family of 4-bit microcontrollers developed by National Semiconductor. The family was introduced a year after the COPS I in 1977. Components in the COPS II were made in nMOS and CMOS technology instead of pMOS as used in COPS I. The COPS II obsoleted the COPS I family soon after release.
In late 1981 National Semiconductor introduced a number of dual-core microcontrollers, one of the earliest instances of multiple CPUs in on single integrated circuit.
2nd sources[edit]
Members[edit]
| Part | ROM | RAM | Frequency | Package | Notes |
|---|---|---|---|---|---|
| COP310C | 512 B | 128 b | 4.098 kHz - 62.5 kHz | DIP24 | CMOS, extended temperature version of 410 |
| COP311C | 512 B | 128 b | 4.098 kHz - 62.5 kHz | DIP16 | CMOS, extended temperature version of 411 |
| COP324C | 2,048 B | 512 b | 62.5 kHz - 250 kHz | DIP28 | extended temperature version of 424 |
| COP325C | 2,048 B | 512 b | 62.5 kHz - 250 kHz | DIP24 | extended temperature version of 425 |
| COP326C | 2,048 B | 512 b | 62.5 kHz - 250 kHz | DIP20 | extended temperature version of 426 |
| COP402 | 256 b | 250 kHz - 500 kHz | DIP40 | ROM-less version of COP420, for prototyping | |
| COP402M | 256 b | 250 kHz - 500 kHz | DIP40 | ROM-less version of COP420, for prototyping, for MICROBUS | |
| COP404L | 512 b | 250 kHz - 500 kHz | DIP28 | ROM-less version of COP444L, for prototyping | |
| COP410L | 512 B | 128 b | 4.098 kHz - 62.5 kHz | DIP24 | |
| COP410C | 512 B | 128 b | 4.098 kHz - 62.5 kHz | DIP24 | CMOS version of 410 |
| COP411L | 512 B | 128 b | 4.098 kHz - 62.5 kHz | DIP16 | |
| COP411C | 512 B | 128 b | 4.098 kHz - 62.5 kHz | DIP16 | CMOS version of 411 |
| COP413L | 512 B | 128 b | 4.098 kHz - 62.5 kHz | DIP20 | |
| COP413C | 512 B | 128 b | 4.098 kHz - 62.5 kHz | DIP20 | CMOS version of 413 |
| COP414L | 512 B | 128 b | 4.098 kHz - 62.5 kHz | DIP20 | |
| COP420 | 1,024 B | 256 b | 250 kHz - 500 kHz | DIP28 | |
| COP420L | 1,024 B | 256 b | 62.5 kHz - 250 kHz | DIP28 | Low-power version |
| COP420C | 1,024 B | 256 b | 4.098 kHz - 62.5 kHz | DIP28 | CMOS version of 420 |
| COP421 | 1,024 B | 256 b | 250 kHz - 500 kHz | DIP24 | Identical to COP420, but DIP24 |
| COP421L | 1,024 B | 256 b | 62.5 kHz - 250 kHz | DIP24 | Low-power version |
| COP424C | 2,048 B | 512 b | 62.5 kHz - 250 kHz | DIP28 | Enhanced version of COP420, obsoleted it |
| COP425C | 2,048 B | 512 b | 62.5 kHz - 250 kHz | DIP24 | |
| COP426C | 2,048 B | 512 b | 62.5 kHz - 250 kHz | DIP20 | |
| COP444L | 2,048 B | 512 b | 250 kHz - 500 kHz | DIP28 | Identical to COP420, twice the memory (2xROM/2xRAM) |
| COP444C | 2,048 B | 512 b | 250 kHz - 500 kHz | DIP28 | CMOS version of 444 |
| COP445L | 2,048 B | 512 b | 250 kHz - 500 kHz | DIP24 | Identical to COP444L, but DIP24 |
| COP445C | 2,048 B | 512 b | 250 kHz - 500 kHz | DIP24 | CMOS version of 445 |
| DIP28 and DIP24 chips are architecturally identical; 4 IN ports are simply omitted on the smaller package. | |||||
Dual cores[edit]
Announced in 1981 and manufactured later that year, National introduced a number of dual-core microcontrollers. While primitive by today's standard (no notion of mutual exclusion), those chips were true dual core - perform calculations independently of each other and capable of accessing the same ROM, RAM, and I/O ports.
| Part | ROM | RAM | Frequency | Package | Notes |
|---|---|---|---|---|---|
| COP2340 | 2,048 B | 640 b | Identical to COP2440, extended temperature | ||
| COP2404 | ROM-less version of COP2440, for prototyping | ||||
| COP2440 | 2,048 B | 640 b | |||
| COP2441 | |||||
| COP2442 |
Design[edit]
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COP400 ISA[edit]
- Main article: COP400 ISA
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Documents[edit]
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| designer | National Semiconductor + |
| full page name | national semiconductor/cops ii + |
| instance of | microcontroller family + |
| instruction set architecture | COP400 + |
| main designer | National Semiconductor + |
| manufacturer | National Semiconductor + |
| name | National COP400 + |
| package | DIP16 +, DIP20 +, DIP24 +, DIP28 + and DIP40 + |
| technology | nMOS + and CMOS + |
| word size | 4 bit (0.5 octets, 1 nibbles) + |