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Using the Timing Instrument
5
Once a Probe file is open and a device connection has been
made, the checksum of the target device is read and compared
to the checksum in the Probe file. If the checksums do not
match, probing is disabled and an error message is displayed.
Table 2 lists and explains the error messages.
To probe a node:
1. Select the node from the tree by clicking the node
name.
2. Click the PRA or PRB button. The selected node is routed
to the probe pin and the corresponding analyzer input is
switched to the debug connector. The net name is also
displayed in the waveform window.
Using the Timing Instrument
Note: This section
does not apply to
Silicon Explorer Lite.
Select Silicon Explorer from the Designer menu under Programs
in the Start menu and check the status in the lower right corner
of the display. If the COM port is properly selected and power
has been applied, then the status will read IDLE. The Timing
Instrument captures 64K samples which are then uploaded to
the host over the serial port.
Table 2. Checksum Error Messages
Error Message Explanation
Checksum: 383A v.s. ????
The checksum cannot be read
because the probe is not con-
nected or not powered.
Checksum: 383A v.s. 0000
The checksum does not match
the file.