![Microchip Technology SAMA5D2-PTC-EK Скачать руководство пользователя страница 25](http://html1.mh-extra.com/html/microchip-technology/sama5d2-ptc-ek/sama5d2-ptc-ek_user-manual_1786073025.webp)
Pin No
Mnemonic
PIO
Shared
Signal Description
12
GND
–
–
Common ground
13
GND
–
–
Common ground
14
GND
–
–
Common ground
3.2.10
Communication Interfaces
The SAMA5D2-PTC-EK board is equipped with Ethernet and USB host/device communication interfaces.
This section describes the signals and connectors related to the ETH and USB communication interfaces.
3.2.10.1 Ethernet 10/100 (GMAC) Port
The SAMA5D2-PTC-EK board features a Micrel PHY device (KSZ8081) operating at 10/100 Mb/s. The
board supports RMII interface modes. The Ethernet interface consists of two pairs of low-voltage
differential pair signals designated from GRX± and GTX± plus control signals for link activity indicators.
These signals can be used to connect to a 10/100 Base-T RJ45 connector integrated on the SAMA5D2-
PTC-EK board.
An individual 48-bit MAC address (Ethernet hardware address) is allocated to each product. This number
is stored in the Microchip 24AA02E48 I2C serial EEPROM (refer to
).
Additionally, for monitoring and control purposes, a LED functionality is carried on the RJ45 connectors to
indicate activity, link, and speed status.
For more information about the Ethernet controller device, refer to the Micrel KSZ8081RN controller
manufacturer's datasheet.
Figure 3-26. Ethernet Interface
top/bot
top/bot
top/bot
top/bot
ETH_LED0
TX+
ETH_XI
ETH_XO
ETH_LED1
TX-
RX+
RX-
GND_POWER
GND_POWER
GND_POWER
GND_POWER
VDDA_3V3
VDD_3V3
VDD_3V3
VDD_3V3
ETH_INT_PB24
ETH_GTXCK_PB14
ETH_GTXEN_PB15
ETH_GRXDV_PB16
ETH_GRXER_PB17
ETH_GRX0_PB18
ETH_GRX1_PB19
ETH_GTX0_PB20
ETH_GTX1_PB21
ETH_GMDC_PB22
ETH_GMDIO_PB23
NRST
R200
10K
R0402
R198
1K
R0402
R
20
2
1
0
K
R
04
02
U17
KSZ8081RNB
qfn32_1p5h
RXC/B-CAST_OFF
19
CRS/CONFIG1
29
COL/CONFIG0
28
TXD1
25
TXD0
24
TXEN
23
RXD3/PHYAD0
13
RXD2/PHYAD1
14
RXD1/PHYAD2
15
RXD0/DUPLEX
16
RXDV/CONFIG2
18
RXER/ISO
20
MDC
12
MDIO
11
INTRP/NAND
21
VDDA_3V3
3
VDDIO
17
RESET
32
TXP
7
TXM
6
RXP
5
RXM
4
VDD_1V2
2
GND
1
PADDLE
33
TXC
22
TXD2
26
TXD3
27
REXT
10
XO
8
XI
9
LED0/NWAYEN
30
LED1/SPEED
31
R193
10K
R0402
R197
1K
R0402
C130
100nF
C0402
R192
10K
R0402
C128
10uF
C0603
R199
10K
R0402
C129
100nF
C0402
R203
10K
R0402
R
20
4
1
0
K
R
04
02
C123
2.2uF
C0603
C127
10uF
C0603
C124
100nF
C0402
R
20
5
1
0
K
R
04
02
L19
BLM18PG181SN1D
R0603
1
2
R
20
6
1
0
K
R
04
02
R194
6.49K 1%
R0402
R196
0R
R0402
R
20
1
1
0
K
R
04
02
SAMA5D2-PTC-EK
Board Components
©
2017 Microchip Technology Inc.
DS50002709A-page 25