R0E521000EPB00 User’s Manual
5. Troubleshooting
REJ10J0844-0400 Rev.4.00 October 16, 2007
Page 81 of 88
5.2 When the Emulator Debugger Does Not Start Up Properly
5.2.1 When the LEDs of the PC7501 Do Not Display Normally
Table 5.1 Errors LEDs show and their checkpoints
Error
Connection to
the user system
Checkpoint
LEDs do not light up.
-
Check that the power cable is connected.
See "2.5 Connecting the Power Supply for the Emulator" (page 24).
All LEDs remain lit.
-
Recheck the connection between the PC7501 and this product.
See "2.4 Connecting the PC7501" (page 23).
The POWER LED of "TARGET
STATUS" does not light up.
Connected Check
that
power (VCC) is properly supplied to the user system and
that the user system is properly grounded.
Not connected
(1) Check that both the main and sub clocks of the emulator
debugger are not set to "EXT".
See the CLK command of the emulator debugger.
(2) Check the oscillation circuit in the emulator is oscillating.
See "2.10.3 Selecting Clock Supply" (page 40).
The CLOCK LED of "TARGET
STATUS" does not light up.
Connected
(1) When the clock is supplied from an external oscillator, check
that the oscillator circuit in the user system is oscillating
properly.
(2) Check the switches in the emulation probe are properly set.
See "2.10.1 Setting Switches of Emulation Probe" (page 38).
The RESET LED of "TARGET
STATUS" does not go out.
Connected
Check that the reset pin of the user system is held high.
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