Patent ID: 6643572
Filing Date: 2003-11-04
Classification: B62D,G06F

Abstract:
A vehicle controller comprising:an occasionally-erasable nonvolatile memory built in a vehicle control computer and having an erasable region for storing control processing information; unerasable region setting means for setting an unerasable region for storage of intrinsic data in said occasionally-erasable nonvolatile memory; and auxiliary storage means for updating the control processing information stored in said erasable region to new control processing information, wherein said auxiliary storage means includes means for determining whether the intrinsic data stored in the unerasable region of said occasionally-erasable nonvolatile memory has been modified by comparing the intrinsic data stored in the unerasable region before the control processing information stored in the erasable region has been updated with the intrinsic data in the unerasable region after the control processing information stored in the erasable region has been updated.