ZT8101 Intel (CPU), ZT8101 Datasheet - Page 54

• Manufacturer Part Number: ZT8101
• Manufacturer: Intel (CPU)

Specifications of ZT8101

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Hardware
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Figure 5. Hot Swap LED
Table 31. Board Status LED
Hot Swap
The blue hot swap LED has controlled ejector switch logic, which is powered by early power and
the CPLD. A 3.3 V high signal from the CPLD means to turn on the LED. Since a blue LED
requires a large forward voltage, it uses the following circuit to drive the blue LED.
A PIO pin is used to indicate that the ejector latch of the switch has been opened. When the user
opens the ejector latch of the switch, the PIO pin is pulled low to inform the CPU that hot swap is
in progress. When the switch’s polling task notices this event, it forces each port into link down
mode and then lights a LED to indicate that it is safe to unplug the switch.
Board Status LED
Ethernet Channel LEDs
The LED array on the front panel displays information about all the Ethernet links on the board. A
green/amber two-color LED is used for each of the 26 Ethernet port connections (24 10/100 + 2
Gigabit). A push button switch just below the array toggles the LED display from Link /Activity
mode to Link / Speed mode. The default LED mode is Link /Activity. When the switch button is
depressed, the LEDs are in Link/Speed mode.
Off
Green
Amber
Status
Intel
®
Not powered.
Powered.
Powered and attention needed. Possible conditions include:
• Over temperature
• Exceeding voltage limits
• IPMB time outs
NetStructure
TM
ZT 8101 10/100 Ethernet Switch Technical Product Specification
HSR
Meaning
5V