GE PACSystems RX7i, Reference Manual

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GFK-2222AD April 2018 139
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