Circuit board identity generator

Details Circuit board identity generator Circuit board identity generator

1981-08-17

1984-07-03

Orsino, Jr., Joseph A.

Electrical pulse counters, pulse dividers, or shift registers: c

Applications

Control

377 31, 377 33, 365236, 365239, 364200, G06F 1300

Patent

active

044583575

ABSTRACT:
A plurality of identical circuit board identification generators are individually located on an associated plurality of circuit boards in a computer system, each generator providing a unique identification for each associated circuit board. Identification numbers are automatically and sequentially generated by the generators upon the initial system turn on or upon a resetting of the system. The generators comprise a counter and logic circuitry for enabling the counters. The counters are initially disabled and pre-set to a maximum count. The first counter is then enabled and counts from the maximum to zero, and delivers an enable signal to the logic circuitry in the next circuit board to enable that counter. The enable signals propagate from board to board until the last board commences its count, at which time all counters are disabled. In this manner, N circuit boards will be identified as boards "O" through "N-1." Additional circuitry may be provided to extend the counting range and to identify the boards as "1" through "N," if desired.

REFERENCES:
patent: 4000487 (1976-12-01), Patterson et al.
patent: 4280199 (1981-07-01), Osakabe et al.

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