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When the emulator PC4701U is powered on, all LEDs are lit for about two seconds. Figure 3.2

shows a transition of system status LEDs and target status LEDs on/off conditions when the emula-

tor PC4701U has started up normally after power-on, with the target MCU and target system func-

tioning normally.

Figure 3.2 LED display when system has started up normally

3.1.1 System Status LEDs

The system status LEDs indicate the emulator PC4701U's power supply, firmware operating status,

etc. Table 3.1 lists the definition of each system status LED.

Table 3.1 Definition of system status LEDs

3.1.2 Target Status LEDs

The target status LEDs typically indicate the target MCU's power supply and operating status.

Table 3.2 lists the definition of each target status LED.

Table 3.2 Definition of target status LEDs

POWER

SAFE

ERROR

POWER

CLOCK

RESET

RUN

HALT

STATUS OF

SYSTEM

STATUS OF

TARGET

POWER

SAFE

ERROR

POWER

CLOCK

RESET

RUN

HALT

STATUS OF

SYSTEM

STATUS OF

TARGET

: ON

: OFF

LED

Name

POWER

SAFE

ERROR

ON/OFF

Turned On

Turned OFF

Turned On

Flashing

Turned OFF

Turned On

Flashing

Turned OFF

Meaning

Emulator PC4701U power supply is turned on.

Emulator PC4701U power supply is turned off.

PC4701U system is operating normally.

1. Self-check is under way.

2. Firmware download is written into EEPROM.

3. If SAFE and ERROR LED are lit at a time, it means that the self-check can not

be executed because of target system operating error.

PC4701U system is faulty (system status error).

1. Firmware is being downloaded.

2. If SAFE and ERROR LED are lit at a time, it means that the self-check can not

be executed because of target system operating error.

PC4701U system is operating normally.

Name

POWER

CLOCK

RESET

RUN

HALT

ON/OFF

Turned On

Turned OFF

Turned On

Turned OFF

Turned On

Turned OFF

Turned On

Turned OFF

Turned On

Turned OFF

Meaning

Power is supplied to target MCU.

Power is not supplied to target MCU.

Target MCU clock is oscillating.

Target MCU clock is not oscillating.

Target MCU is reset.

Target MCU is not reset.

Target program is being executed.

Target program has been halted.

Target MCU has been halted by an instruction or hardware condition.

Target MCU is operating.

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