Real-Time Clock; File System; Directories; Storage Options - Overview - Jetter JVM-104-O15 User Manual

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Jetter AG

7.5 Real-time clock

NOTICE

File categories

INFO

System directories

JVM-104-O15 User Manual

A real-time clock is used for time measurement. If there is a permanent connec-

tion between ECU_PWR of the controller and the vehicle battery, the real-time

clock will continue to run for a certain period of time even when the controller is

switched off. The real-time clock has no automatic daylight savings time function.

The JVM-104-O15 has a built-in battery with a service life of at least 10 years.

The file system lets you access files located on the internal flash disk or an USB

flash drive. When problems occur, a good understanding of the file system is very

helpful.

Malfunctions caused by missing or damaged system files.

Careless handling of system files may caus malfunctions.

Some files may be protected against read/write access or deletion. Some of

these files are virtual files, such as firmware images, or protected files, such as

EDS files.

The files of the file system are categorized as follows:

■

System directories or system files used by the operating system

■

Files accessible to the user

For more information refer to the application-oriented manual "File System"

which can be downloaded from our homepage.

The user is not allowed to delete system directories. System directories even sur-

vive formatting.

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