Main Logic Board Jumpers - Sun Microsystems Ultra Enterprise 450 Product Notes

Main Logic Board Jumpers

The following information supersedes the information presented in the
Ultra Enterprise 450 Server Owner's Guide concerning main logic board jumpers:
Contrary to the table in the section "About the Clock Mode Select Jumper," the
clock mode select jumper (J2701) is now used on the Ultra Enterprise 450 server
main logic board (501-5270).
Set the clock mode jumper shunt at address J2701 to correspond to the speed of your
UltraSPARC II CPU module. Verify that the jumper setting is correct before starting
the system.
Jumper
J2701
1. Factory setting for main logic boards shipped without CPU modules installed.
The table describing the settings for the three flash PROM jumpers is incorrect.
The corrected table appears below.
Jumper
J3102
J3103
J5501
1-4 Ultra Enterprise 450 Server Product Notes • June 1999
Shunt on Shunt on
Pins 1 + 2 Selects Pins 2 + 3 Selects
Correct clock Correct clock
mode for mode for
UltraSPARC II UltraSPARC II
250- and 300-MHz 400-MHz CPU
CPU modules modules
Shunt on Shunt on
Pins 1 + 2 Selects Pins 2 + 3 Selects
Flash PROM Not To Be Used
Write Protect Write Enable
High Half Booting Normal Booting
1
Default Shunt
on Pins Signal Controlled
1 + 2 UPA_RATIO2
Default Shunt
on Pins Signal Controlled
1 + 2 FLASH PROM SEL
2 + 3 FLASH PROM
PROG ENABLE
2 + 3 XOR LOGIC SET