US 6,725,351 B1 · Data communication device having a buffer in a nonvolatile storage device

Abstract

A data communication device which includes a flash memory, a primary buffer region in the flash memory which has time-sequential information stored therein from earliest to, an auxiliary buffer region in the flash memory which receives and stores primary-buffer storage information to be stored in the primary buffer region during a first condition of the data communication device when the information stored in the primary buffer region is not allowed to be updated, and an information-storage control unit which, when the primary-buffer storage information is stored in the auxiliary buffer region and during a second condition of the data communication device when updating of the information in the primary buffer region is allowed, reads information having a size not more than the storage capacity of the primary buffer region from the information stored in said primary buffer region and the auxiliary buffer region, and which re-stores the information that has been read in the primary buffer region.

Claims19

Dependent claims

A data communication device comprising:

a flash memory;
a primary buffer region provided in said flash memory and having a plurality of pieces of information stored therein time-sequentially from an earliest piece of information to a latest piece of information;
an auxiliary buffer region provided in said flash memory for receiving and storing pieces of primary-buffer storage information to be stored in said primary buffer region in said auxiliary buffer region during a first condition of said data communication device when the information stored in said primary buffer region is not allowed to be updated;
and
an information-storage control unit for, when the primary-buffer storage information is stored in said auxiliary buffer region and during a second condition of said data communication device when updating of the information in said primary buffer region is allowed, reading information having a size not more than the storage capacity of said primary buffer region from the information stored in said primary buffer region and said auxiliary buffer region, and re-storing the information that has thus been read in said primary buffer region.

2 more elements

A method of storing information in a data communication device, comprising the steps of:

providing a flash memory;
defining a primary buffer region in said flash memory for receiving a plurality of pieces of information therein time-sequentially from an earliest piece of information to a latest piece of information;
defining an auxiliary buffer region in said flash memory for receiving and storing pieces of primary-buffer storage information to be stored in said primary buffer region in said auxiliary buffer region during a first condition of said data communication device when the information stored in said primary buffer region is not allowed to be updated;
and
when the primary-buffer storage information is stored in said auxiliary buffer region and during a second condition of said data communication device when updating of the information in said primary buffer region is allowed, reading information having a size not more than the storage capacity of said primary buffer region from the information stored in said primary buffer region and said auxiliary buffer region;
and
re-storing the information that has thus been read in said primary buffer region.

4 more elements

Dependencies are inferred from the claim text.

Data communication device having a buffer in a nonvolatile storage device

Life of this patent

Data communication device having a buffer in a nonvolatile storage device

Life of this patent

Abstract

Claims19