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M301N2T-PRB User’s Manual 1. Outline
REJ10J0037-0100 Rev.1.00 Mar.16, 2005
Page 15 of 48
(2) Target Status LEDs
The target status LEDs indicate the target MCU's operating status and power supply. Table 1.4 lists the definition of each target
status LED.
Table 1.4 Definitions of the target status LEDs
Name Status Meaning
ON Power is supplied to the target MCU.
POWER
OFF Power is not supplied to the target MCU.
ON Target MCU clock is supplied.
CLOCK
OFF Target MCU clock is not supplied.
ON Target MCU is being reset, or reset signal of the user system is held low.
RESET
OFF Target MCU is not being reset.
ON User program is being executed.
RUN
OFF User program has been halted.
ON Target MCU internal clock is not oscillating.
HALT
OFF Target MCU internal clock is oscillating.
IMPORTANT
Caution for Target Status POWER LED:
If your MCU has two or more power supply terminals (VCC), you need to supply power to all the
terminals.