Semiconductor & Computer Engineering
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| production end = 1998 | | production end = 1998 | ||
| arch = 4-bit bit-slice | | arch = 4-bit bit-slice | ||
| − | | word = 4 | + | | word = 4 bit |
| proc = <!-- process, e.g. "8 μm" --> | | proc = <!-- process, e.g. "8 μm" --> | ||
| tech = Bipolar | | tech = Bipolar | ||
Revision as of 00:21, 5 June 2016
| AMD Am2900 | |
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| |
| Am2903 Enhanced ALU | |
| Developer | AMD |
| Manufacturer | AMD |
| Type | microprocessors |
| Production | 1975-1998 |
| Architecture | 4-bit bit-slice |
| Word size | 4 bit 0.5 octets
1 nibbles |
| Technology | Bipolar |
| Clock | 1 MHz-31 MHz |
| Package | DIP40, DIP42 |
The AMD Am2900 is a family of 4-bit bit-slice chips designed by Advanced Micro Devices and introduced to the market in August 1975. Each component represents an individual unit in a microprocessor. Designed to be flexible and expandable, those chips were capable of emulating a large number of existing systems. Made in bipolar technology allowed for higher speeds (1-20Mhz, later up to 32). Its flexibility, higher speed, unusually large amount of 2nd sources, and good marketing allowed AMD to dominate the bit-slice market. To date, the Am2900 family is used as the de facto baseline for bit-slice design.
2nd sources
The Am2900 had a large number of 2nd sources:
| 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Motorola | |||||||||||||||||||||
| Thomson-CSF | |||||||||||||||||||||
| Raytheon | |||||||||||||||||||||
| National | |||||||||||||||||||||
| Fairchild | |||||||||||||||||||||
| Signetics | |||||||||||||||||||||
| NEC | |||||||||||||||||||||
| OKI | |||||||||||||||||||||
| Cypress | |||||||||||||||||||||
| Vitesse | |||||||||||||||||||||
| Elektronika | |||||||||||||||||||||
Members
| Family Members | |
|---|---|
| Part | Description |
| AM2901 AM2901A AM2901B |
4-bit ALU |
| AM2902 | Carry-lookahead generator |
| AM2903 AM2903A |
4-bit ALU, Enhanced version of the 2901 |
| AM2904 | Status and shift control unit |
| AM2905 | Quad 2-input bus transceiver |
| AM2906 | Quad 2-input bus transceiver with parity |
| AM2907 AM2908 |
Quad bus transceiver with interface logic |
| AM2909 AM2909A AM2911 |
4-bit-slice address sequencer |
| AM2910 | 12-bit address sequencer |
| AM2912 | Quad bus transceiver |
| AM2913 | Priority interrupt expander |
| AM2914 | Priority interrupt controller |
| AM2915 AM2916 AM2917 |
Quad 3-state bus transceiver |
| AM2918 AM29LS18 |
Quad D register |
| AM2919 | Quad register |
| AM2920 | Octal D flip-flip register |
| AM2921 | 1-to-8 decoder |
| AM2922 AM2923 |
8-input MUX |
| AM2924 | 3-to-8 decoder |
| AM2925 | Clock generator |
| AM2926 AM2929 |
3-state quad bus driver |
| AM2927 AM2928 |
Quad 3-state Bus Transceiver |
| AM2930 | Program control unit |
| AM2932 | Program control unit for push/pop stack |
| AM2940 | DMA Address generator |
| AM2940 | Timer/Counter/DMA Address generator |
| AM2946 AM2947 AM2948 AM2949 |
Octal 3-state bidirectional bus transceiver |
| AM2950 AM2951 |
Bidirectional I/O Port |
| AM2954 AM2955 |
Octal registers |
| AM2956 AM2957 |
Octal latches |
| AM2958 AM2959 |
Octal buffer |
| AM2960 | 16-bit error detection and correction unit |
| AM2961 AM2962 |
4-bit error correction bus buffer |
| AM2964 | Dynamic memory controller |
| AM2965 AM2966 |
Octal dynamic memory driver |
Design
The family includes two 4-bit ALUs - 2901 and a 2903. The AM2901/A was the original chip designed, supporting 8 different basic operations. The AM2903/A was an enhanced version designed a bit later which included 7 additional operations. The slices can be stacked to produce 8, 12, or 16 data paths and memory addresses for use in larger programs.
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Warning: Default sort key "Am2900" overrides earlier default sort key "Am2900, AMD".
| designer | AMD + |
| full page name | amd/am2900 + |
| instance of | microprocessor family + |
| main designer | AMD + |
| manufacturer | AMD + |
| name | AMD Am2900 + |
| package | DIP40 + and DIP42 + |
| technology | Bipolar + |
| word size | 4 bit (0.5 octets, 1 nibbles) + |