Support identification device

Details Support identification device Support identification device

2005-12-08

2010-06-01

Stiglic, Ryan M (Department: 2111)

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus expansion or extension

C710S301000, C326S059000

Reexamination Certificate

active

07730251

ABSTRACT:
A support identification device comprising a support (BPA), e.g. a rack or backplane of a telecommunication system, and an identity receiver (PCB), e.g. a printed circuit board or card, coupled to an identity transmitter or connector of the support. The identity transmitter has several read pins (id1-id4=R1-R4) each at a logical level (0, 1) to indicate (identify) the type of support. The card (PCB) further has write terminals (W1, W2) coupled to dynamic terminals (D1, D2) of the support (BPA). These dynamic terminals are coupled to one or more of the read pins (id1-id4). The card is also provided with a program that sets the write terminals at a first logical level, reads a first logical level at each read pin (R1-R4), then sets the write terminals at a second logical level, reads a second logical level at each read pin, and determines from the difference between the first and the second read logical levels to which write terminal each read terminal is coupled, or not. This allows to obtain (2+w)nidentifications with n read pins and w write pins, instead of 2n+widentifications with the same total number n+w of read or basic pins.

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patent: 7550997 (2009-06-01), Gruijl
patent: 2008/0211543 (2008-09-01), Gruijl
patent: 2009/0172234 (2009-07-01), Ji et al.
patent: 1 146 429 (2001-10-01), None

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