3. Configuration
Cuttable Traces The ZT 4807 includes several cuttable traces (0 Ω shorting resistors) that allow the user to
configure certain options not configurable through the processor board's BIOS Setup Utility.
In most cases, the default settings are appropriate for normal operation; however, some
applications may require different settings. The "Switch and Cuttable Trace Locations"
figure shows the placement of the ZT 4807's cuttable traces.
There are two types of cuttable traces on the ZT 4807: single-option and double-option:
• Single option cuttable traces are implemented using 0603 and 1206 surface mount
pads. A 0 Ω shorting resistor is soldered between these pads to make the connection.
• Double option cuttable traces are implemented using three 0603 surface mount pads. A
0 Ω shorting resistor is soldered between one set of pads, depending on the chosen
option.
Caution: Only qualified technicians familiar with surface mount soldering techniques
should perform cuttable trace modifications. The product warranty is voided if the board is
damaged by customer modifications.
Cuttable Trace Descriptions
The “Cuttable Trace Definitions” table provides a quick cross-reference for the ZT 4807
cuttable trace descriptions that follow.
Cuttable Trace Definitions
CT# Default Description
CT1 Out Connect Top ESD Strip to Logic Ground
CT2 Out Connect Bottom ESD Strip to Logic Ground
CT3 Out Connect Reset Switch Case to Logic Ground
CT4 Out Connect NMI Switch Case to Logic Ground
CT5 B Connect Compact Flash Power to Switched 5V
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