Chapter 4 Cpu Operation - GE PACSystems RX7i Reference Manual

Chapter 4 CPU Operation

This chapter describes the operating modes of a PACSystems CPU and describes the tasks the CPU
carries out during these modes. The following topics are discussed:
■ CPU Sweep
■
Program Scheduling Modes
■
Window Modes
■ Data Coherency in Communications Windows
■ Run/Stop Operations
■
Flash Memory Operation
■
Logic/Configuration Source and CPU Operating Mode at Power-Up
■ Clocks and Timers
■
System Security
■
PACSystems I/O System
■ Power-Up and Power-Down Sequences
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