Casio IT-2000W manual Basic System Operation Overview, OFF State On KEY, On State OFF Event

2.2Basic System Operation

2.2.1Overview

Basic operation of this system on the terminal consists of the suspend/resume process and boot process operated by means of the Power switch and RESET switch, as shown in the following diagram.

OFF STATE

ON KEY

Application BOOT

ON STATE

OFF EVENT

RESET SWITCHOFF Process

OFF EVENT

OFF Process

System Menu BOOT

RESET SWITCH

ON EVENT

ON Process

System Menu

System Menu BOOTSUSPEND STATE

ON KEY INITIAL STATE System Menu BOOT

Fig. 2.3

During normal operation the system status will move between the ON state and the OFF state, shown in the above diagram, by pressing the power key.

The SUSPEND state is a state from which the previous state can be returned to at any time. The process of returning from the SUSPEND state to the ON state is called the resume process.

The RESET switch is used to either re-start the system or to initiate the System Menu, which is the maintenance program. Press this RESET switch to start hardware initialization followed by initiation of the System Menu. This process is called the System Menu boot process.

If an OFF event occurs while the System Menu is operating, the system shifts to the OFF state. If the ON key is pressed in the OFF state, the boot process is executed again and an appropriate application program will be loaded. This process is called the application boot process.

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