Venice Single Board Computer Operating Manual
PCIe Socket Reset & WiFi Disable
The Mini-PCIe sockets support individual software programmable resets and shared
WiFi disable signals. The reset signal is controlled through the processor PCIe
interface and the WiFi disable signal is controlled through the Gateworks System
Controller.
Micro-SD and Nano SIM Expansion
A combined Micro-SD and Nano SIM socket extends the functionality of the SBC.
The Micro-SD extends the local Flash storage capacity. The socket accepts small 11mm
by 15mm removable cards with storage capacities from 64Mbytes to 32Gbytes. The
4-bit data interface supports transfer rates up to 25Mbytes per second. This readily
available storage device is commonly used in cellular phones, GPS devices, portable
media players, and digital cameras.
The Micro-SD socket communicates with the processor using the SD[2] Secure Digital
interface and supports a card detect signal SD2_CD signal. Software drivers are
available for SD format cards.
The Nano SIM (4FF) socket accepts 12.3 mm by 8.8 mm cellular SIM cards. The SIM
signals are routed to a single Mini-PCIe socket, J10, for cellular modem usage.
GbE Ethernet
The SBC supports Gigabit Ethernet. The Ethernet ports operate in a 10BASE-T,
100BASE-TX or 1000BASE-T configuration and include auto MDI/MDIX for
automatically switching data receive and data transmit pairs. Additional features include
full-duplex operation as well as support for auto- negotiation. The data interfaces
include direct-touch ESD protection that exceeds IEC61000-4-2-ESD. The Ethernet
MAC addresses are programmed into the Gateworks System Controller Configuration
EEPROM during automated factory testing.
The IEEE802.3 compliant Ethernet MAC Media Access Controllers are located in the
processor. The Gigabit Ethernet Port MAC communicates to an external PHY physical
layer device through an RGMII interface. The external PHY is reset under software
control using a processor digital I/O signal.
The RJ45 connector for the Gigabit Ethernet Port includes integrated status lights. The
green light is on for link and blinking for activity. The yellow status light indicates speed.
The yellow light is off for both 10Mbps and 100Mbps, and on for 1000Mbps.
The SBC input power can be provided through the Gigabit Ethernet Port jack in a
Passive Power over Ethernet or 802.3at active Power over Ethernet architecture. This is
discussed in greater detail at the end of this section. The RJ45 connectors can be
replaced with an 8-pin dual-row 2mm header such as the JST B08B-PUDSS as an
ordering option.
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