The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 04, 2007
Filed:
May. 08, 2002
Hidefumi Oodate, Kodaira, JP;
Atsushi Shiraishi, Kodaira, JP;
Shigeo Kurakata, Kawagoe, JP;
Kunihiro Katayama, Chigasaki, JP;
Motoki Kanamori, Tachikawa, JP;
Hidefumi Oodate, Kodaira, JP;
Atsushi Shiraishi, Kodaira, JP;
Shigeo Kurakata, Kawagoe, JP;
Kunihiro Katayama, Chigasaki, JP;
Motoki Kanamori, Tachikawa, JP;
Renesas Technology Corp., Tokyo, JP;
Hitachi ULSI Systems Co., Ltd., Tokyo, JP;
Abstract
In the initial setting of a memory card, the flash check data FD stored in a flash memoryis read out, this data FD is compared with the operation check data FDstored previously in the ROM, the write check data FDstored in the ROMis written, if a fault is not detected, to the flash memory, and this data is read again and is compared with the write check data FDof the ROM. When any fault is not detected in comparison of these data, the CPU determines that the flash memoryis normal. Moreover, if a fault is detected in the comparison of data, the CPU sets the reset process fault data to a registerto set a controllerto the sleep mode. When the command CMD is received during this period, data comparison is executed again.