MAS STELLA i.MX6, Руководство по оборудованию

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2.2 Connectivity
uSD CON
Stella contains two on board uSD connector supporting micro SD cards up to 192Mbit/sec
(24MByte/sec) in High-Speed SD mode 4-bit data transfer. The CPU can boot from this
devices.
Extremely small size: Small external dimensions and the above-the-board height make
the connectors the smallest on the market.
Card detection switch: The card detection switch is Normally Open
LAN
The core implements a triple speed 10/100/1000 Mbit/s Ethernet MAC compliant with
the IEEE802.3-2002 standard. The MAC layer provides compatibility with half- or full-
duplex 10/100 Mbit/s Ethernet LANs and full-duplex gigabit Ethernet LANs.
RGMII Gigabit Ethernet Phy
The KSZ9031RNX is a completely integrated triple-speed (10Base-T/100Base-
TX/1000Base-T) Ethernet physical-layer transceiver for transmission and reception of data
on standard CAT-5 unshielded twisted pair (UTP) cable.
The KSZ9031RNX provides the reduced gigabit media independent interface (RGMII) for
direct connection to RGMII MACs in gigabit Ethernet processors and switches for data
transfer at 10/100/1000Mbps.
The KSZ9031RNX reduces board cost and simplifies board layout by using on-chip
termination resistors for the four differential pairs and by integrating an LDO controller to
drive a low-cost MOSFET to supply the 1.2V core.
The KSZ9031RNX offers diagnostic features to facilitate system bring-up and debugging in
production testing and in product deployment. Parametric NAND tree support enables fault
detection between KSZ9031 I/Os and the board. The LinkMD
®
TDR-based cable
diagnostic identifies faulty copper cabling. Remote and local loopback functions verify
analog and digital data paths.
For more information about the Gigabit Ethernet devices see the following link
http://www.micrel.com/index.php/products/lan-solutions/phys/article/2.html
Pag. 12 of 41 STELLA i.MX6
Hardware Manual
Rev.1.0