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US Patent 6219736 - Universal serial bus (USB) RAM architecture for use with microcomputers via an interface optimized for integrated services device network (ISDN)
US Patent Issued on April 17, 2001
Estimated Patent Expiration Date:
November 12, 2018Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
November 12, 2018Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractA RAM-based interrupt-driven interface device is disclosed for establishing a communication link between a universal serial bus (USB) host and a microcontroller device for providing a control function, the interface device being operative to receive digital information in the form of command, data and control packets from the host and to process the packets and communicate the processed digital information to the microcontroller device, and in response thereto, the microcontroller device being operative to communicate digital information to the interface device for processing and transfer thereof to the host. The interface device includes means for receiving a command generated by the host through a USB bus, means for storing the host-generated command and for generating an interface device interrupt signal upon storage of said host-generated command for use by the microcontroller device in responding to the host-generated command, a microcontroller bus for transferring microcontroller information and the interface device interrupt signal between the interface device and the microcontroller device. The interface device further includes means for receiving a microcontroller command from the microcontroller device in response to said interface device interrupt signal and means for storing the microcontroller command and it is operative to generate a microcontroller device interrupt signal upon storage of the microcontroller command for use by the interface device in developing an address for identification of the interface device to the host during subsequent communications therebetween, wherein during communication between the host and the interface device, the interface device-developed address is used by the interface device to identify host-provided information in the form of packets, and upon processing of the host-provided information, to provide the microcontroller device with the necessary information to allow it to respond to the host thereby allowing a generic microcontroller device to be flexibly interfaced with a USB, host for communication therebetween.Other References
| InventorApplicationNo. 191443 filed on 11/12/1998US Classes:710/315, Different protocol (e.g., PCI to ISA)370/259, SPECIAL SERVICES370/420, For connecting plural subscribers to a network (i.e., network termination)370/524, Using a dedicated signaling channel (i.e., D-channel)709/226, Network resource allocating709/250, NETWORK-TO-COMPUTER INTERFACING710/14, Mode selection710/52, Input/Output data buffering710/100INTRASYSTEM CONNECTION (E.G., BUS AND BUS TRANSACTION PROCESSING)Field of Search710/52, Input/Output data buffering710/14, Mode selection710/100, INTRASYSTEM CONNECTION (E.G., BUS AND BUS TRANSACTION PROCESSING)709/250, NETWORK-TO-COMPUTER INTERFACING709/226, Network resource allocating370/259, SPECIAL SERVICES370/420, For connecting plural subscribers to a network (i.e., network termination)370/524Using a dedicated signaling channel (i.e., D-channel)ExaminersPrimary: Lee, Thomas C.Assistant: Peyton, Tammara Attorney, Agent or FirmUS Patent References4604683, Communication controller using multiported random access memoryIssued on: 08/05/1986 Inventor: Russ , et al.4799156, Interactive market management system Issued on: 01/17/1989 Inventor: Shavit , et al.5309440, ISDN user-network interface system Issued on: 05/03/1994 Inventor: Nakamura, et al.5497373, Multi-media interface Issued on: 03/05/1996 Inventor: Hulen, et al.5530894, Adapter for interfacing a computer to a multichannel digital network, with port for a telephone Issued on: 06/25/1996 Inventor: Farrell, et al.5537654, System for PCMCIA peripheral to execute instructions from shared memory where the system reset signal causes switching between modes of operation by alerting the starting address Issued on: 07/16/1996 Inventor: Bedingfield, et al.5541930, Byte aligned communication system for transferring data from one memory to another memory over an ISDN Issued on: 07/30/1996 Inventor: Klingman5574861, Dynamic allocation of B-channels in ISDN Issued on: 11/12/1996 Inventor: Lorvig, et al.5682552, Data communication adapter and data communication terminal apparatus for performing data transmission and reception between terminals Issued on: 10/28/1997 Inventor: Kuboki, et al.5859993, Dual ROM microprogrammable microprocessor and universal serial bus microcontroller development system Issued on: 01/12/1999 Inventor: Snyder5974486, Universal serial bus device controller comprising a FIFO associated with a plurality of endpoints and a memory for storing an identifier of a current endpoint Issued on: 10/26/1999 Inventor: Siddappa6044428Configurable universal serial bus node Issued on: 03/28/2000 Inventor: Rayabhari International ClassG06F 013/00 |
