29 Digital Kernel

The Digital Kernel functional block is responsible for the coordination of all activities within the meter. This block requires power supply voltages from the Power Supply and reset signals from the Display Assembly.

Specifically, the Digital Kernel Microprocessor performs the following functions:

• Executes the instructions in ROM

• Stores temporary data in RAM

• Store meter configuration and calibration data in EEROM

• Communicates with the Analog Measurement Processor via the Serial Communication (Guard Crossing) block

• Communicates with the Display Controller to display readings and user interface information

• Scans the user interface keyboard found on the Display Assembly

• Communicates via the RS-232 interface and optional IEEE-488 interface.

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