Zed Audio Ra Podręcznik Użytkownika Pobierz pdf (Strona 21)

02-Oct-2013

2.7.3 User LEDs

The ZedBoard has eight user LEDs, LD0 – LD7. A logic high from the Zynq-7000 AP SoC I/O

causes the LED to turn on. LED’s are sourced from 3.3V banks through 390Ω resistors.

Table 14 - LED Connections

Signal Name

Subsection

Zynq pin

LD0

T22

LD1

T21

LD2

U22

LD3

U21

LD4

V22

LD5

W22

LD6

U19

LD7

U14

LD9

D5 (MIO7)

2.8 10/100/1000 Ethernet PHY

The ZedBoard implements a 10/100/1000 Ethernet port for network connection using a Marvell

88E1518 PHY. This part operates at 1.8V. The PHY connects to MIO Bank 1/501 (1.8V) and

interfaces to the Zynq-7000 AP SoC via RGMII. The RJ-45 connector is a TE Connectivity

1840750-7 featuring integrated magnetics. The RJ-45 has two status indicator LEDs that indicate

traffic and valid link state.

A high-level block diagram of one 10/100/1000 Ethernet interface is shown in the following figure.

data_tx[3:0]

clk_tx

control_tx

data_rx[3:0]

clk_rx

control_rx

Crystal

125Mhz

Marvell 88E1518 PHY

XC7Z020

phy_reset

TransmitReceive

10/100/1000

Magnetics

RJ45

Connector

LEDs

TD_P

TD_N

RD_P

RD_N

gtxclk

Figure 11 - 10/100/1000 Ethernet Interface

Zynq requires a voltage reference for RGMII interfaces. Thus PS_MIO_VREF, F8, is tied to 0.9V,

half the bank voltage of MIO Bank 1/501.

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 37 38

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