Xilinx Zynq UltraScale+ ZCU104, User Manual

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ZCU104 Board User Guide 48
UG1267 (v1.1) October 9, 2018 www.xilinx.com
Chapter 3: Board Component Descriptions
Ethernet PHY LED Interface
[ Figure 2-1 , callout 9]
The DP83867IRPAP PHY U98 LED interface (LED_0, LED_2) uses the two LEDs embedded in
the P12 RJ45 connector bezel. The LED functional description is listed in Table 3-15 .
The LED functions can be re-purposed with a LEDCR1 register write available via the PHY's
management data interface, MDIO/MDC. LED_2 is assigned to the activity indicator (ACT)
and LED_0 indicates link established. For more Ethernet PHY details, see the TI DS83867
data sheet [Ref 16] .
Table 3-15: Ethernet PHY LED Functional Description
Pin
Type Description
Name Number
LED_2 61 S, I/O, PD
By default, this pin indicates receive or transmit
activity. Additional functionality is configurable using
LEDCR1[11:8] register bits.
Note:
This pin is a strap configuration pin for RGZ devices
only.
LED_1 62 S, I/O, PD
By default, this pin indicates that 100BASE-T link is
established. Additional functionality is configurable
using LEDCR1[7:4] register bits.
LED_0 63 S, I/O, PD
By default, this pin indicates that link is established.
Additional functionality is configurable using
LEDCR1[3:0] register bits.
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