The NEC
µPD7720 is the name of
fixed point"Fixed point" has many meanings in science, most of them mathematical.* Fixed point * Fixed point combinator* Fixed-point arithmetic, a manner of doing arithmetic on computers* Benchmark , fixed points used by geodesists...
digital signal processorA digital signal processor is a specialized microprocessor with optimized architecture for fast operational needs of Digital Signal Processing.-Typical characteristics:...
s from NEC (currently NEC Electronics Corporation). It was introduced in 1980, at which time it was the first commercial DSP in the industry. 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
instructionIn computer science, an instruction is a single operation of a processor defined by an instruction set architecture. In a broader sense, an "instruction" may be any representation of an element of an executable program, such as a bytecode....
format, enabling all of
ALUIn computing, an arithmetic logic unit is a digital circuit that performs arithmetic and logical operations. The ALU is a fundamental building block of the central processing unit of a computer, and even the simplest microprocessors contain one for purposes such as maintaining timers...
operation, address register increment/decrement operation, and move operation in one cycle.
Discussion
Ask a question about 'NEC µPD7720' Start a new discussion about 'NEC µPD7720' Answer questions from other users |
The NEC
µPD7720 is the name of
fixed point"Fixed point" has many meanings in science, most of them mathematical.* Fixed point * Fixed point combinator* Fixed-point arithmetic, a manner of doing arithmetic on computers* Benchmark , fixed points used by geodesists...
digital signal processorA digital signal processor is a specialized microprocessor with optimized architecture for fast operational needs of Digital Signal Processing.-Typical characteristics:...
s from NEC (currently NEC Electronics Corporation). It was introduced in 1980, at which time it was the first commercial DSP in the industry. 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
instructionIn computer science, an instruction is a single operation of a processor defined by an instruction set architecture. In a broader sense, an "instruction" may be any representation of an element of an executable program, such as a bytecode....
format, enabling all of
ALUIn computing, an arithmetic logic unit is a digital circuit that performs arithmetic and logical operations. The ALU is a fundamental building block of the central processing unit of a computer, and even the simplest microprocessors contain one for purposes such as maintaining timers...
operation, address register increment/decrement operation, and move operation in one cycle.
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.