Page 779 - Automotive Engineering Powertrain Chassis System and Vehicle Body

CHAP TER 2 3. 1 Automotive instrumentation and telematics

Fig. 23.1-7 Data demultiplexer.

23.1.3.1 Advantages of computer-based memory (ROM) with another. Remember that the pro-
instrumentation gram is permanently stored in a ROM that is typically
packaged in a single integrated circuit package.
One of the big advantages of computer-based instru- Another benefit of microcomputer-based electronic
mentation is its great flexibility. To change from the automotive instrumentation is its improved performance
instrumentation for one vehicle or one model to another compared with conventional instrumentation. For ex-
requires only a change of computer program. This change ample, the conventional fuel gauge system has errors
can often be implemented by replacing one read-only that are associated with variations in the mechanical

Fig. 23.1-8 Sequential sampling.

790