Semiconductor integrated circuit for central processor interfaci

Details Semiconductor integrated circuit for central processor interfaci Semiconductor integrated circuit for central processor interfaci

1991-07-02

1995-01-03

Coleman, Eric

Boots, shoes, and leggings

3642419, 364243, 364252, 364251, 364DIG1, G06F 300

Patent

active

053793951

ABSTRACT:
A semiconductor integrated circuit serves as an interface between a CPU and the outside enabling communication between systems. More specifically, when a selector is switched to the CPU side, RAMs are accessed at random by the CPU to write data therein, and when the selector is switched to transmission controlling portion, the RAMs are serially accessed by the transmission controlling portion to read data therefrom to be transmitted. When selectors are switched to a reception controlling portion side, RAMs are serially accessed by the reception controlling portion to write data therein, and when the selectors are switched to the CPU side, the RAMs are accessed at random by the CPU to read data therefrom.

REFERENCES:
patent: 4755937 (1988-07-01), Glier
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patent: 5099331 (1992-03-01), Truong
patent: 5133062 (1992-07-01), Joshi
patent: 5155807 (1992-10-01), Blevins
patent: 5222213 (1993-06-01), Petty
"Printer Buffer Proves RAM-Based Logic's Strength and Versatility" by S. Landry, Electronic Design, Nov. 14, 1985 pp. 139-144.
DE Firms publication, VALVO, Technische Information, No. 83-1031, 1983, pp. 1-12.

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