Semiconductor device for keyless entry transmitter

Details Semiconductor device for keyless entry transmitter Semiconductor device for keyless entry transmitter

2006-09-26

2006-09-26

Zimmerman, Brian (Department: 2612)

Communications: electrical

Selective

Intelligence comparison for controlling

C340S005720

Reexamination Certificate

active

07113072

ABSTRACT:
A semiconductor device for a keyless entry transmitter has a command data circuit connected to communication terminals for communication with a microcomputer. A memory circuit is connected to the command data circuit for storing rolling code data. A timer period setting register is connected to the command data circuit for storing timer period setting data. A timer circuit is connected to the command data circuit, the timer period setting register and a clock terminal for outputting an enable signal for placing the microcomputer into an intermittent operation state upon receiving an output signal of the command data circuit, an output signal of the timer period setting register, and a clock signal of the clock terminal. A regulator output voltage setting register is connected to the command data circuit for outputting a signal in response to an output signal of the command data circuit. A regulator circuit is connected to the regulator output voltage setting register for outputting an output voltage upon receiving an input voltage and the output signal of the regulator output voltage setting register.

REFERENCES:
patent: 4656463 (1987-04-01), Anders et al.
patent: 5517189 (1996-05-01), Bachhuber et al.
patent: 5838257 (1998-11-01), Lambropoulos
patent: 6104333 (2000-08-01), Wood, Jr.
patent: 6104334 (2000-08-01), Allport
patent: 6292107 (2001-09-01), Yamaura et al.
patent: 6664899 (2003-12-01), Tsuchihashi
patent: 2003/0034898 (2003-02-01), Shamoon et al.

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