Analog Devices DC1840C Demo Manual page 11

DEMONSTRATION CIRCUIT 1680B OPERATION
Interrupt LED
A red LED indicates when the INT line is pulled logic low
by the daughter card. When the interrupt is cleared (high)
2
via I C servicing, the LED is turned off.
Figure 13. DC1680B Address Switch, Pushbutton Switches, INT LED, and Port Power LEDs
DEMO MANUAL DC1840C
Port 1 Through 12 Power LED Indicators
Each PSE port has a green LED indicator to show when
PoE power is present at the port. The LEDs are driven by
the respective port OUT voltage.
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Rev E
11