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3 mode control, Internal operations – Toshiba T2N User Manual

Page 114

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2.INTERNAL OPERATIONS

User’s manual

101

The T2N operation mode is selected according to the status of the mode switch

on the CPU module and mode change requests from the peripherals

(programmer,computer link,data transmission system).

The T2N operation mode is basically divided into three, the RUN mode, the HALT

mode and the ERROR mode. The ERROR mode is when diagnostic checks

conclude that normal operation can not continue.

The figure below shows basic mode transition. Also, within the RUN mode, other

than the usual RUN mode, there are also RUN-F, HOLD and DEBUG modes

mainly for debugging.

2.3

Mode Control

RUN mode

Mode change request

by operation mode switch

Mode change request

by programmer peripherals

HALT mode

RUN mode

RUN-F mode

HOLD mode

DEBUG mode

ERROR mode

Result of self diagnostics