ZCU102 Evaluation Board User Guide www.xilinx.com 50
UG1182 (v1.2) March 20, 2017
Chapter 3: Board Component Descriptions
Ethernet PHY Reset
The DP83867IRPAP PHY U98 reset circuit is shown in Figure 3-13. The DP83867IRPAP can be
reset by the SW9 push-button (U59.6), the MAX16025 U22 MPSoC PS-side POR reset device
(U59.1), or the I2C0 connected U97 TCA6416A I/0 expander port P06 pin 10 (U59.3).
Ethernet PHY LED Interface
[Figure 2-1, callout 12]
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 show 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 ACT (activity indicator) and
X-Ref Target - Figure 3-13
Figure 3-13: Ethernet PHY Reset Circuit
Table 3-15: Ethernet PHY LED Functional Description
Pin
Type Description
Name No.
LED_2 61 S, I/O, PD
By default, this pin indicates receive or transmit activity.
Additional functionality is configurable by means of 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 by means of 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 by means of LEDCR1[3:0] register
bits.
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