Chapter 10
Maintaining the System
93
Motherboard Jumpers
The Netra t1’s motherboard contains several jumpers. We do not recommend you
change any of their settings. However, for reference, the factory default settings are
listed in
and the locations of the jumpers are shown in
* Where no jumper is provided, the jumper is used only during manufacturing and is removed before shipping.
TABLE 10-2
Jumper Settings
Jumper
Setting
Description
Default
J1401
2-3
Enable Flash Write
Installed
1-2
Disable Flash Write
J1501
Joint Test Action Group (JTAG) test header
No jumper
provided*
J1502
2-3
Scan Clock
1-2
External Clock
Installed
J3301
2-3
Enable Loopback Reset
Installed
1-2
Disable Loopback Reset
J3302
2-3
Enable User Flash Write
Installed
1-2
Disable User Flash Write
J3303
2-3
Boot from System Flash
Installed
1-2
Boot from ROM Emulator
J3304
2-3
Enable Boot from User Flash
Installed
1-2
Disable Boot from User Flash
J3306
2-3
7-segment display bias
Installed
1-2
J3601
J3602
J3401
Used for Host ID PROM mounting header
J4703
1-2
2-3
Programmable Logic Device (Test Data Out)
Compact PCI (Test Data Out)
No jumper
provided*
J1001
1-2
SCSI active enable terminator
Installed
2-3
SCSI active disable terminator
J1002
1-2
Terminator power enable
Installed
2-3
Terminator power disable
SysAdmin.book Page 93 Friday, March 30, 2001 2:38 PM
Содержание Netra t1 100
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