Chapter 1 - Specifications
1-10
IBC 2600 User’s Guide
The circuitry is based on National Semiconductor’s LM80. The LM80
monitors seven system voltages, two fan speeds and the board ambient
temperature. All of the voltages, fan speeds and temperature measure-
ments have associated programmable watchdog Emits. When any of
these programmed limits are exceeded, the monitor software can be
used to notify the SBC. In addition, the externally available OS# signal
can be used to notify external hardware of any over-temperature condi-
tion.
Fan speed monitoring can be configured to monitor two system fans.
The LM80 also monitors an external chassis intrusion switch via the sys-
tem hardware monitor connector (P13) on the rear I/O transition
A general purpose output (GPO) is also provided at the system hardware
monitor connector on the Rear I/O Transition Module. This signal can be
used to provide a user-defined function.
The following system voltages are monitored by the LM80:
S
- 12 volts
S
3.3 volts provided by the on-board voltage regulator for
components on the SBC
S
3.3 volts backplane power used by the option slots
S
+5 volts
S
+12 volts
S
VCC CORE, voltage provided by on-board VRM
S
1.5 volt, VTT voltage used by processor’s GTL+ bus
PCI 10/100BASE-T ETHERNET INTERFACE (DUAL)
The dual PCI Ethernet interfaces are implemented using two Intel 82559
Ethernet controllers and operate in 10Base-T and 100base-TX Fast
Ethernet modes. The interfaces are compliant with IEEE 802.3 and PCI
Local Bus 2.0 and 2.1 Specifications.
Summary of Contents for IBC 2600
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