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3.3.3
Ethernet connectors
10/100 Ethernet Port #1
Pin
Signal
Pin
1
ETH1_Tx+
2
ETH1_Tx-
3
ETH1_Rx+
4
---
10/100 Ethernet Port #2
Pin
Signal
Pin
1
ETH2_Tx+
2
ETH2_Tx-
3
ETH2_Rx+
4
---
μSD card slot
3.3.4
μSD Card Slot
CN73
Pin
Signal
1
SDIO_DAT2
2
SDIO_DAT3
3
SDIO_CMD
4
+3.3V
SDIO
5
SDIO_CLK
6
GND
7
SDIO_DAT0
8
SDIO_DAT1
CardDetect
SDIO_CD#
SBC-C23
SBC-C23 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author: S.B. - Reviewed by L.B. -Copyright © 2020 SECO S.p.A.
On board, there can be up to two FastEthernet interfaces, made available
CN64
by as many Micrel KSZ8091RNA 10Base-T/100Base-Tx Ethernet
Transceivers interfaced to NXP processor's RGMII interfaces.
Signal
Connectors are type TRXCOM p/n TRJ19401BGNL or equivalent, with
5
---
2kV decoupling capacitor.
6
ETH1_Rx-
7
---
On the connectors there are also two LEDs: LED1 (Left LED, yellow) shows activity on the link
8
---
(when blinking); LED2 (Right LED, Green) turns on when a 10Mbps or 100Mbps connection
has been established.
CN65
ETH1_Tx+/ETH1_Tx--: Ethernet Controller #1 Transmit differential pair.
Signal
ETH1_Rx+/ETH1_Rx--: Ethernet Controller #1 Receive differential pair.
5
---
ETH2_Tx+/ETH2_Tx--: Ethernet Controller #2 Transmit differential pair.
6
ETH2_Rx-
ETH2_Rx+/ETH2_Rx--: Ethernet Controller #2 Receive differential pair.
7
---
8
---
The first Ethernet port is always available, while the second port is a factory option.
The NXP i.MX6 SoloX processor embeds four Ultra Secured Digital Host controllers (uSDHC), able to support SD / SDIO / MMC
Cards.
For this reason, on SBC-C23 board there is also a socket, for the use of standard microSD cards, which
can be used as Mass Storage and/or Boot Devices.
The connector is a microSD connector, push-push type, H=2mm, type WELLCO TWF1 or equivalent.
SDIO_CD#: Card Detect Input.
SDIO_CLK: SD Clock Line (output).
SDIO_CMD: Command/Response bidirectional line.
SDIO_DAT[0÷3]: SD Card data bus. SDIO_DAT0 signal is used for all communication modes. SDIO_DAT[1÷3] signals are
required for 4-bit communication mode.
+3.3V
voltage
is derived from NVCC_3V0 power rail. It can be switched on and off via SW (SDIO_PWR signal, managed using
SDIO
the i.MX6 pad B15).
24
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