Dialer with internal option select circuit programmed with exter

Details Dialer with internal option select circuit programmed with exter Dialer with internal option select circuit programmed with exter

1997-07-30

1999-12-14

Westin, Edward P.

Electronic digital logic circuitry

Multifunctional or programmable

Array

326 41, 326 47, 379361, H03K 1901, H03K 326

Patent

active

RE0364436

ABSTRACT:
An option select circuit for a dialer includes an internal address generator (20) for generating an address pattern, which, in a set up mode, is output from a multiplexer (14) to I/O pins (10). The pins (10) are selectively hardwired through an interface circuit (24) back to address input pins (50) and (52) for input to a decorder (28). The decoder (28) decodes the selected address for input to a PLA (30). This allows selection of various functions in a function generator (12) for operation in the normal dialer mode. The interface circuit (24) comprises hardwire connections (54) and (56).

REFERENCES:
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patent: 5198707 (1993-03-01), Nicolai
Nachrichten Elektronik, vol. 34, No. 11, Nov. 1980, Heidelerg De, pp. 382-286; H. Wesolowski: "Ein mikrocomputergesteuertes Tastwahleltefon."

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