Sony Corporation

Advanced Micro Devices Corporation

Kazushige Tsurumi

Yoshihisa Takayama

Tadashi Morita

Susumu Kusakabe

Kunihide Fujii

Dale E Gulick

Munehiro Yoshikawa

Hiroshi Matsubara

Alan F Hendrickson

Joe W Peterson

Masahiro Asai

Toshihiro Fujita

Yoshihiko Owaki

Kunihide Fuji

A communication system and communication method enable various types of near field communication. NFC communication apparatuses have two features in that each can perform communication in two communication modes and that each can perform data transmission at a plurality of transfer rates. The two communication modes consist of a passive mode and an active mode. In the passive mode, between the NFC communication apparatuses, for example, a first NFC communication apparatus transmits data to a second NFC communication apparatus by modulating electromagnetic waves generated by itself, while the second NFC communication apparatus transmits data to the first NFC communication apparatus by performing load modulation on the electromagnetic waves generated by the first NFC communication apparatus. Alternatively, in the active mode, either of the NFC communication apparatuses transmits data by modulating electromagnetic waves generated by itself. The present innovation can be applied to, for example, an IC card system, etc.

Communication system, communication method, and data processing apparatus

A communication system performs, by first and second data processing apparatuses, an electromagnetic-induction communication using a carrier having a single frequency. A transfer rate for use between the first and second data processing apparatuses is changeable in one transaction. The first data processing apparatus determines whether a transfer rate can be changed based on data transmitted from the second data processing apparatus. When the first data processing apparatus determines that the transfer rate can be changed, the first data processing apparatus transmits to the second data processing apparatus a request to change the transfer rate to one of a plurality of transfer rates.

The present invention relates to a communication system and communication method which enable various types of near field communication, and a data processing apparatus. NFC communication apparatusestohave two features in that each can perform communication in two communication modes and that each can perform data transmission at a plurality of transfer rates. The two communication modes consist of a passive mode and an active mode. In the passive mode, between the NFC communication apparatusesand, for example, the NFC communication apparatustransmits data to the NFC communication apparatusby modulating electromagnetic waves generated by itself, while the NFC communication apparatustransmits data to the NFC communication apparatusby performing load modulation on the electromagnetic waves generated by the NFC communication apparatus. Alternatively, in the active mode, either of the NFC communication apparatusesandtransmits data by modulating electromagnetic waves generated by itself. The present invention can be applied to, for example, an IC card system, etc.

The present invention relates to an information processing terminal that makes it possible to readily upgrade software of information processing terminals connected by a network. When a control program stored in a display apparatusB is upgraded by a control program stored on a memory card, an upgrade program for a base stationand the control program for display apparatusA andC read by the display apparatusB are transmitted to the base station. The base stationupgrades a control program stored therein by the upgrade program received by the base station, and also transmits the control program for the display apparatusA andC to the display apparatusA andC. The display apparatusA andC each upgrade a control program stored therein by the upgrade program received by the display apparatusA andC, respectively.

Information processing terminal

An I/O port interrupt mechanism includes a source register connected to the port for reporting sources of interrupts arising within the port, an interrupt mask register connected to the source register and operable to configure the I/O port for generation of interrupts, and an interrupt controller connected to the output of the source register and operable to hold off interrupts arising within the I/O port.

General I/O port interrupt mechanism

A serial communication port structure for starting and stopping an internal clock. This internal clock is designed, in operation, to generate a clock output signal to be transmitted to a device external to the system in which the serial communication port is incorporated. By ANDing the clock output signal with a data output signal of predetermined length, the serial communication port can effectively control the passage of time as sensed by the external device.

Growing community of inventors

Kanagawa, Japan

Kazushige Tsurumi