Microcomputer having data move circuits for within-memory shift

Details Microcomputer having data move circuits for within-memory shift Microcomputer having data move circuits for within-memory shift

1984-09-26

1986-04-29

Thomas, James D.

Boots, shoes, and leggings

G06F 1306, G06F 1500

Patent

active

045861315

ABSTRACT:
A system for real-time digital signal processing employs a single-chip microcomputer device having separate on-chip program ROM and data RAM, with separate address and data paths for program and data. An external program address bus allows off-chip program fetch in an expansion mode, with the opcode returned by an external data bus. A bus interchange module allows transfer between the separate internal program and data busses in special circumstances. The internal busses are 16-bit, while the ALU and accumulator are 32-bit. A multiplier circuit produces a single state 16.times.16 multiply function separate from the ALU, with 32-bit output to the ALU. One input to the ALU passes through a 0-to-15 bit shifter with sign extension. The data RAM has an internal shift arrangement useful in processing convolution algorithms. An addressed location in the RAM is read out and also shifted to the next higher location in one instruction cycle.

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patent: 4451883 (1984-05-01), Stanley et al.
patent: 4484259 (1984-11-01), Palmer et al.
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patent: 4488252 (1984-12-01), Vassar
patent: 4491910 (1985-01-01), Caudel et al.
patent: 4516199 (1985-05-01), Frieder et al.

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