ONLINE UPDATE METHOD FOR VEHICLE-MOUNTED DEVICE

ONLINE UPDATE METHOD FOR VEHICLE-MOUNTED DEVICE

When a power supply is cut off on updating programs, improper data remains since the power source to be supplied to the vehicle-mounted device is unstable. The check for the improper data and restoration processing are required for a reactivation processing implemented by an update processing unit s...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: NAGAI YASUSHI, SUMITOMO YOSHITAKA, AKUTSU SHOICHI, KAWAMURA SHINJI, KASUYA HIROYUKI, SHIMIZU ATSUSHI
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Beschreibung
Zusammenfassung:When a power supply is cut off on updating programs, improper data remains since the power source to be supplied to the vehicle-mounted device is unstable. The check for the improper data and restoration processing are required for a reactivation processing implemented by an update processing unit so that the update is completed correctly, therefore, the user is waited. In contrast, the update processing also implemented by the update processing unit for a time period during which the power source becomes unstable is interrupted, and implemented for the time period during which the power source voltage is stable. In consequence, the update processing is carried on steadily without making the user wait.