USPIIi-1v Hardware Manual
B
-
6
Themis Computer
B.2.3
PMC Carrier Board Jumpers
There are no jumpers on the PMC Carrier Board.
B.3
Factory Configurables
B.3.1
Baseboard Solder Beads
Table B-3.
Baseboard Component Side Solder Beads
Solder Bead
Setting
Description
SB3202
Open (Default)
Chassis GND RF is coupled to GND for noise reduction
Short
Chassis GND is shorted to GND
SB3302
Open (Default)
Disables Watchdog
Short
Enables Watchdog
Table B-4.
Baseboard Solder Side Solder Beads
Solder Bead
Setting
Description
SB1801 to
1805
1-2
Defines PS/2 configuration: serial port A on front panel “CONSOLE” con-
nector, PS/2 keyboard/mouse signals on front panel “KEYBD/MOUSE”
connector. On P2: serial port B or PS/2 keyboard/mouse signals,
depending on SB1806-1811
2-3
Defines Sun configuration: Sun keyboard/mouse signals on front panel
“CONSOLE” connector and on P2
SB1806 to
1811
1-2
In PS/2 configuration: serial port B signals on P2, PS/2 keyboard/mouse
signals on front panel “KEYBD/MOUSE” connector only
MUST BE SET TO 2-3 FOR SUN CONFIGURATION
2-3
In PS/2 configuration: serial port B is not accessible. PS/2 keyboard/
mouse signals on front panel “KEYBD/MOUSE” connector AND on P2.
MUST BE SET TO 2-3 FOR SUN CONFIGURATION
SB1401
1-2
+5 V to FLASH (Default)
2-3
+12 V to FLASH
SB3203
Open
Chassis GND RF is coupled to GND for noise reduction (Default)
Short
Chassis GND is shorted to GND
SB3301
Open
FLASH is two (2) 28F016 devices (Default)
Short
FLASH is two (2) 28F032 devices
SB3303
Open
Used for Engineering Prototype Testing Only (Default)
Short
Содержание USPIIi-1v
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