Semiconductor & Computer Engineering
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[[Category:4-bit microprocessors]] | [[Category:4-bit microprocessors]] | ||
[[Category:1975 microprocessors]] | [[Category:1975 microprocessors]] | ||
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| + | [[Categroy:AMD Am2900 family]] | ||
Revision as of 15:16, 31 October 2015
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 (8.3-12Mhz, 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.
| 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 |
2nd sources
The Am2900 had a large number of 2nd sources:
- Elektronika
- Fairchild
- Motorola, October 1975
- National
- NEC
- Raytheon, December 1975
- Signetics
- Thomson-CSF
- Vitesse, November 1985
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".Categroy:AMD Am2900 family