NEC µPD7720
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The NEC µPD7720 is the name of fixed point digital signal processors from NEC (currently NEC Electronics Corporation). It was introduced in 1980, which was the first commercial DSP in the industory. The NEC µPD7720 runs at 4MHz frequency with 128-word data RAM, 512-word data ROM, and 512-word program memory, which has VLIW-like instruction format, enabling all of ALU operation, address register increment/decrement operation, and move operation in one cycle.
[edit] Variants
The NEC µPD77C25, which succeeds the µPD7720, runs at 8MHz frequency with 256-word data RAM, 1,024-word data ROM, and 2,048-word program memory.
