System and method for data bus communication system between...

Details System and method for data bus communication system between... System and method for data bus communication system between...

2006-05-23

2006-05-23

Peyton, Tammara (Department: 2182)

Electrical computers and digital data processing systems: input/

Intrasystem connection

C710S047000, C710S264000, C710S008000, C711S115000

Reexamination Certificate

active

07051128

ABSTRACT:
This invention is an information processing device such as a computer, as a host device, and a memory card as an external connection device to be connected to the host device. A memory card (1) and a host device (2) are connected with each other in accordance with a six-wire-system half-duplex protocol using four-bit parallel signals, a bus state signal, and a clock signal. When the state of the bus state signal is a state of accepting interruption, the memory card (1) sends an interrupt signal (INT) to four-bit parallel buses. Different elements of interruption are allocated to the respective bits of the four-bit parallel signals. That is, the bit at which the INT signal is sent varies depending on the content of interruption.

REFERENCES:
patent: 6470407 (2002-10-01), Losi
patent: 54-16945 (1979-02-01), None
patent: 56-14329 (1981-02-01), None
patent: 2001-202254 (2001-07-01), None

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