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LXD9781 PQFP Demo Board
Table 13. Serial LED Outputs
Serial Output
LEDS_2
LEDS_1
LEDS_0
1. LEDs are configured active Low.
5.3
Direct Drive LEDs
The LXD9781 provides three programmable LED drivers per port. Each LED can display one of
several available status conditions as selected by the LED Configuration Register (Address 20)
shown in
Table
Programmable LEDs (LED_1, LED_2, LED_3) are set in default mode and are programmable via
the MDIO pin. Register address 20 also provides optional LED pulse stretching up to 100 ms.
Register bits 20.3:2 select one of three possible stretch times.
16
Condition
Duplex
Polarity (10 Mbps)
Activity
14.
Status
0 = Full Duplex
1 = Half Duplex
0 = Switched Polarity
1 = Normal Polarity
0 = Active
1 = Inactive
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