Gated shift register

Details Gated shift register Gated shift register

1987-11-05

1989-07-18

Heyman, John S.

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

Systems

Using shift register

377 77, 377 75, 377 32, 365219, G11C 1900, G11C 2900, H03K 2140

Patent

active

048500003

ABSTRACT:
A gated shift register includes a first set of 16 storage devices and a second set of 16 storage devices with interconnection circuitry for configuring the first set of 16 storage devices as a 16 bit shift register. The second set of storage devices is coupled between the outputs of the first set of storage devices and 16 output terminals of the gated shift register and transfers the outputs from the first storage devices to the output terminals when a transfer input terminal is at a first logic state, and isolates the first storage devices from the output terminals and retains the data at the output terminals when the transfer input signal switches to a second logic state. The gated shift register also includes power monitor and control circuitry for supplying standby battery voltage to the circuit when the primary power source becomes unavailable.

REFERENCES:
patent: 3845282 (1974-10-01), Mattson
patent: 3916323 (1975-10-01), Moriyama et al.
patent: 4085311 (1978-04-01), Ohsako et al.
patent: 4697279 (1987-09-01), Baratti et al.
Data Sheet, which appeared in the 1985-86 Data Book of Dallas Semiconductor Corporation, for the DS1223 part.

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