Device and method for providing a simulation of an idle UART to

Details Device and method for providing a simulation of an idle UART to Device and method for providing a simulation of an idle UART to

1996-02-12

1998-05-12

Ray, Gopal C.

Pulse or digital communications

Repeaters

Testing

375222, 379 9328, H04M 1100, H04L 2710, G06F 132

Patent

active

057520488

ABSTRACT:
The invention prevents an operating system from freezing operation of computer peripherals such as a PCMCIA modem card constructed using an AT&T HSM PID2 Chipset when a suspend mode is activated by the computer. The invention provides a simulation (device: 100, 200; method: 300, 600, 700) of an idle Universal Asynchronous Receiver Transmitter, UART, in a computer peripheral operably coupled to the computer wherein the simulation provides a logic one in a least significant bit position for the PCMCIA data bus, thereby indicating that no data remains to be sent on the PCMCIA data bus.

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patent: 5107518 (1992-04-01), Petty, Jr.
patent: 5179299 (1993-01-01), Tipon
patent: 5555287 (1996-09-01), Gulick et al.

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