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Introduction—Crystal Forest
Ref Des Location
J9A2
J9A3
1.14
On-Board Power Connectors
Table 13.
On-Board Power Connectors
Ref Des
Location
J4K4
J5K2
J9D1
1.15
Watch Dog Timer (WDT)
The PCH has a safeguard watchdog timer to help prevent processor from thermal
overload. During the power-up sequence, the PCH asserts CPUPWRGD. If the
processor reset handshake is not completed within 10 ms of assertion, the PCH will
power cycle the system to re-attempt the boot. It is critical to avoid having the
processor powered and held in reset for an extended time.
The PCH watchdog timer will cause the CRB to power cycle if something does not allow
the processor reset handshake to be completed with 10 ms of CPUPWRGD assertion.
1.16
Sleep States and Soft Off
ACPI 1.0, 2.0, 3.0 APM compliant.
•
S0, S3, S4, and S5 sleep states
•
Soft off capability (S5)
— Operating system dependent
— Requires a complete OS boot when the system wakes
1.17
Wake Events
•
Power switch
•
Wake on LAN (WoL) from GbE (PCH EndPoint/connector) or PCIe port
October 2012
Order No.: 328009-001US
PS/2 Keyboard and
Mouse Connectors
Serial COM Port
Connector
SSI 24-pin power
Provides 12 V (+12V2), -12 V, 5 V, 3.3 V, 5 VSB voltages from the
connector
external power supply.
SSI 8-pin power
Provides 12 V (+12V1) voltages from the external power supply
connector
that feed the CPU.
SSI 8-pin power
Provides 12 V (+12V1) voltages from the external power supply
connector
that feed the DIMMs.
®
®
Intel
Xeon
Processor E3-1125C with Intel
Description
®
See the Intel
Communications Chipset 89xx Series
Datasheet for details on USB operating modes.
The side panel provides two stacked circular DIN PS/2
connectors. Turn off power before a keyboard or mouse
is connected or disconnected.
•
Keyboard connector on bottom (nearest board)
•
Mouse connector on top
The rear panel provides a dual-stack serial COM port.
•
RS232E 9-pin male D-sub dual port connector
•
Only outbound serial port traffic is available
Description
®
Communications Chipset 8910 Development Kit
User Guide
17
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