Front Panel I/O and Control Boards Intel® Server System S7000FC4UR
Revision 1.0
92
12. Front Panel I/O and Control Boards
The front panel I/O board gives the end user access to the system video and USB interfaces. It
also interfaces with the front panel control module that contains the buttons and LEDs.
Circuitry on the I/O board consists of the following:
USB hub controller
Thermal sensor
FRU information EEPROM
Speaker
Miscellaneous circuitry to support the front panel control module
12.1 Architectural Overview
The front panel I/O board provides five main functions for the system.
Main board to SAS backplane signal interconnects
Fan tach (RPM) signals
Fan PWM speed control
Reset logic
I
2
C bus
Backplane D2D enable
Backplane power good signal
USB hub
External front panel connector for three USB 2.0 ports
High-speed hub controller to support the port, above
Required safety fusing and EMI filtering for the hub
Video Output
External front panel 15-pin VGA connector
Required safety fusing and EMI filtering
Speaker
Audible beep-code and alarm speaker
Speaker drive circuitry
Miscellaneous
FRU file storage
Thermal sensor connected to I
2
C bus
NMI button
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