Semiconductor & Computer Engineering
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COPS II - National Semiconductor
| 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, 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.
2nd sources
National Semiconductor, while almost exclusively never 2nd sourcing their own designs, did license the COPS II to Western Digital in 1980. WD continued manufacturing the COPS II until 1984 when they moved into the data storage market.
Members
| Part | ROM | RAM | Frequency | Package | Notes |
|---|---|---|---|---|---|
| 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 | |
| COP413L | 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 |
| 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. | |||||
Design
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COP400 ISA
- Main article: COP400 ISA
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Documents
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Facts about "COPS II - National Semiconductor"
| 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) + |
