Communication device and communication method

摘要

A communication device includes: a communication unit configured to perform proximity communication with a reader/writer; and a control unit configured to control writing of data as to nonvolatile memory in accordance with a command from the reader/writer; with the control unit writing data in a buffer unit that serves as a buffer to buffer data to be written, in accordance with a command from the reader/writer, writing the unit number of an object unit that is a unit to be written with data as the unit number of the buffer unit, and taking the object unit as a new buffer unit, thereby performing writing of data in the object unit; and with the control unit being activated by an RF signal being received from the reader/writer, and erasing all of the pages of the buffer unit during activation processing to be performed before receiving a command from the reader/writer.

主权项

1. A communication device comprising:
communication means configured to perform proximity communication with a reader/writer; and control means configured to control writing of data as to nonvolatile memory in accordance with a command from said reader/writer; wherein a portion of the storage region of said nonvolatile memory is a user block that is a storage region equivalent to the minimum unit assigned to a service; and wherein said user block includes a plurality of units; and wherein said units include one or more pages that are the storage regions of a predetermined unit where writing is performed; and wherein at least one unit of a plurality of units making up said user block is a buffer unit that serves as a buffer to buffer data to be written in said user block; and wherein said nonvolatile memory stores control information for controlling the storage region of said nonvolatile memory; and wherein said control information includes a unit number for determining said units; and wherein said control means
write data in said buffer unit in accordance with a command from said reader/writer without performing processing to determine whether there is correspondence of said buffer unit to the unit number of an object unit that is a unit to be written with data and other than the at least one unit of the plurality of units that is a buffer unit when the command is received at the communication device,write the unit number of the object unit that is a unit to be written with data as the unit number of said buffer unit, andtake said object unit as a new buffer unit of the plurality of units, thereby performing writing of data in said object unit; and wherein said control means are activated by an RF signal being received from said reader/writer at said communication means.