Semiconductor & Computer Engineering
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MB8840 - Fujitsu
| MB8840/MB8840H Family | |
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| |
| Developer | Fujitsu |
| Manufacturer | Fujitsu |
| Production | 1977-1992 |
| ISA | MB8850 |
| Word size | 4 bit 0.5 octets
1 nibbles |
| Technology | nMOS |
| Clock | 1 MHz-6 MHz |
| Package | DIP42, DIP28, QFP48 |
The MB8840/MB8840H series is a family of 4-bit nMOS microcontrollers developed by Fujitsu and introduced in 1977[off?]. This series was very popular for arcade games (e.g. some Atari's Namco Galaga/Xevious systems). This series is architecturally identical to the MB8850 family (A CMOS version).
Contents
Members
The "H" versions are identical to their non-"H" counterparts but aimed to be "high performance", capable of operating at higher frequency (up to 8 MHz).
| Family Members | |||||
|---|---|---|---|---|---|
| Part | ROM | RAM | I/O Ports | Instructions | Notes |
| MB8841 | 2kx8 bit | 128x4-bit | 37 | 70 | |
| MB8842 | 2kx8 bit | 128x4 bit | 25 | 69 | |
| MB8843 | 1kx8 bit | 64x4 bit | 37 | 70 | |
| MB8844 | 1kx8 bit | 64x4 bit | 25 | 69 | |
| MB8845 | 2kx8 bit | 128x4-bit | 37 | 70 | |
| MB8846 | 2kx8 bit | 128x4-bit | 25 | 69 | |
| MB8847 | 1kx8 bit | 64x4 bit | 37 | 70 | |
| MB8848 | 1kx8 bit | 64x4 bit | 25 | 69 | |
ISA
- Main article: MB8850 ISA
The MB8840 has an identical ISA to that of the MB8850.
Documents
See also
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Facts about "MB8840 - Fujitsu"
| designer | Fujitsu + |
| full page name | fujitsu/mb8840 + |
| instance of | integrated circuit family + |
| instruction set architecture | MB8850 + |
| main designer | Fujitsu + |
| manufacturer | Fujitsu + |
| name | MB8840/MB8840H Family + |
| package | DIP42 +, DIP28 + and QFP48 + |
| technology | nMOS + |
| word size | 4 bit (0.5 octets, 1 nibbles) + |