Technical Information – Jumpers, Connectors and Memory
DP2/DP2GX (5664-xxx) System Host Board
Layout Diagram
Jumpers & LEDs
The setup of the configuration jumpers on the SHB is described below. An asterisk (*) indicates the default value of
each jumper.
NOTE: For two-position jumpers (3-post), "RIGHT" is toward the bracket end of the board; "LEFT" is toward the
memory sockets.
JU7
COMBO I/O (P5A) SPEAKER CONNECT
(Also refer to JU18 - Combo I/O Reset Connect.)
INSTALL=Connect speaker data signal to pin 8 of Combo I/O connector (P5A) *
REMOVE=Disconnect
JU8 Password Clear
Install for one power-up cycle to reset the password to the default (null password).
Remove for normal operation. *
JU9
CRT TYPE SELECT
LEFT = Monochrome
RIGHT = Color *
JU10/11 SYSTEM FLASH ROM OPERATIONAL MODES
The Flash ROM has two programmable sections: the Boot Block for "flashing" in the BIOS and the Main
Block for the executable BIOS and PnP parameters. Normally only the Main Block is updated when a new
BIOS is flashed into the system.
Program All (Boot and Main)
Normal PnP (Program Main Block)
Write Protect
JU12 CMOS Clear
JU10JU11
RightRight
Right *Left *
Left
Left
Trenton Support Center – DP2/DP2GX Technical Information -- Jumpers, Connectors and Memory
NOTE: The CMOS Clear jumper works on power-up. To clear the CMOS, power down the system, install
the jumper, then turn the power back on. CMOS is cleared during the POST routines. Then power down the
system again and remove the jumper before the next power-up.
JU13 SCSI TERMINATION ENABLE
(Not available on BASIC model)
INSTALL=Disable on-board active termination for SCSI interface
NOTE: JU15 enables the 3.3V monitor, which monitors the 3.3V power plane of the backplane. This voltage
is routed to the SBC via the PICMG® connector. The monitor generates a RESET to the SBC if 3.3V is
below tolerance. If your system does not supply 3.3V to the backplane, this jumper must be removed
(disabled).
JU16 WATCHDOG TIMER
LEFT = Normal reset *
RIGHT = Enable watchdog
JU17 INTERRUPT 12 (IRQ12) SELECT
INSTALL = IRQ12 dedicated to PS/2 mouse *
REMOVE = IRQ12 available for system use
JU18 COMBO I/O (P5A) RESET CONNECT
(Also refer to JU7 = Combo I/O Speaker Connect.)
INSTALL=Connect reset data signal to pin 1 of Combo I/O connector (P5A) *
REMOVE=Disconnect
JU19 SCSI ACTIVITY LED ENABLE
(not available on BASIC model)
INSTALL=Light the hard drive LED for SCSI drive activity*
REMOVE=No SCSI drive (i.e., the SCSI controller is not being used)
There are four jumpers (W3, W4, W5 and W6) which must be set correctly to allow the SBC to take full
advantage of the speed of the Pentium II/III microprocessor. These jumpers must be set as specified below.
CPU Synthesizer Jumpers
Speed Frequency
850MHz 100MHz In Out In Out
800MHz 100MHz Out In In Out
750MHz 100MHz Out Out Out In
Trenton Support Center – DP2/DP2GX Technical Information -- Jumpers, Connectors and Memory
NOTE: In revision D-D-02 and earlier, W4 was hard-wired in an "In" position
ETHERNET LEDS AND CONNECTORS
The Ethernet interface has two LEDs for status indication and an RJ-45 network connector.
LED/Connector
Link/Activity LED
Speed LED
RJ-45 Network
Connector
(flashing)
Description
Green LED which indicates the link status.
Off =The Ethernet interface did not find a valid link on the network connection. Transmit and receive are
not possible.
On =
The Ethernet interface has a valid link on the network connection and is ready for normal operation.
(solid)
The Speed LED identifies connection speed.
On =
Indicates network transmit or receive activity.
Amber LED which identifies connection speed.
Off =Indicates a 10Mb/s connection.
On =Indicates a 100Mb/s connection.
The RJ-45 network connector requires a category 5 (CAT5) unshielded twisted-pair (UTP) 2-pair
cable for a 100-Mb/s network connection or a category 3 (CAT3) or higher UTP 2-pair cable for a
10-Mb/s network connection.
Trenton Support Center – DP2/DP2GX Technical Information -- Jumpers, Connectors and Memory
The DRAM interface consists of two dual in-line memory module (DIMM) sockets and supports auto detection of
memory up to 512MB of Synchronous DRAM (SDRAM) for the 440BX or up to 1GB of SDRAM for the 440GX.
Minimum memory size is 8MB. The System BIOS automatically detects memory type, size and speed.
The SBC uses industry standard 64-bit or 72-bit wide gold finger DIMM DRAM in two 168-pin DIMM sockets.
NOTE:Memory can be installed in one or both DIMM sockets. If only one DIMM module is used, it must be
populated in the top DIMM socket (Bank 1 - BK1). If two modules are used, they must be the same DIMM type,
but may be different sizes (see table below). EDO DIMMs are not supported. All DIMMs must have gold contacts.
The SBC supports DIMM memory modules which are PC-100 compliant and have the following features:
• 168-pin DIMMs with gold-plated contacts
• 100MHz SDRAM
• Non-ECC (64-bit) or ECC (72-bit) memory
• 3.3 volt only
• Single or double-sided DIMMs in the sizes listed below
• Buffered or Registered configuration
DIMM Size DIMM Type Non-ECC ECC
8 MB Unbuffered 1M x 64 1M x 72
16 MB Unbuffered 2M x 64 2M x 72
32 MB Unbuffered 4M x 64 4M x 72
64 MB Unbuffered 8M x 64 8M x 72
128 MB Unbuffered 16M x 64 16M x 72
256 MB Registered 32M x 64 32M x 72
512 MB Registered 64M x 64 64M x 72 **
** DP2GX models only
All memory components and DIMMs used with the SBC must be PC-100 compliant, which means that they comply
with Intel's PC SDRAM specifications. These include the PC SDRAM Specification (memory component specific),
the PC Unbuffered DIMM Specification, the PC Registered DIMM Specification and the PC Serial Presence Detect
Specification.
Trenton Support Center – DP2/DP2GX Technical Information -- Jumpers, Connectors and Memory
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