Corvalent Gator Mini-ITX, Руководство по установке, Страница: 59 / 71

Appendix C: Industrial Devices
Appendix C On-Board Industrial Devices
The Gator Mini-ITX offers two on-board 10/100 (10/100/1000 optional) Ethernet controllers (second Ethernet
optional), up to six serial ports (one optional RS422/485), watchdog timer and DC power brick connector.
DC power brick connector
Please, contact the manufacturer for technical details of this optional feature.
On-board Ethernet
The Gator Mini-ITX features two 10/100/1000 Ethernet controllers. Ethernet controller 1 is an Intel 82559ER
10/1000 (or 82551ER), that may optionally be upgraded to an Intel 82541ER, which is a 10/100/1000Mbps device.
The optional Ethernet controller 2 is an Intel 82559ER 10/1000 (or 82551ER), that may optionally be upgraded to an
Intel 82541ER, which is a 10/100/1000Mbps device.
The 82559ER/551ER is a 32-bit PCI controller that features enhanced scatter-gather bus mastering capabilities,
which enable the 82559ER/551ER to perform high-speed data transfers over the PCI bus. The 82559ER/551ER bus
master capabilities enable the component to process high-level commands and to perform multiple operations,
thereby off-loading communication tasks from the system CPU.
It can operate in either full duplex or half duplex mode. In full duplex mode it adheres to the IEEE 802.3x Flow
Control specification. Half duplex performance is enhanced by a proprietary collision reduction mechanism.
The Intel
®
82541ER (optional) integrates fourth generation gigabit MAC design with fully integrated, physical layer
circuitry to provide a standard IEEE 802.3 Ethernet interface for 1000BASE-T, 100BASE_TX, and 10BASE-T
applications (802.3, 802.3u, and 802.3ab). The controller is capable of transmitting and receiving data at rates of
1000 Mbps, 100 Mbps, or 10 Mbps. In addition to managing MAC and PHY layer functions, the controller provides
a 32-bit wide direct Peripheral Component Interconnect (PCI) 2.3 compliant interface capable of operating at 33 or
66 MHz.
The 82541ER Architecture is designed for high performance and low memory latency. Wide internal data paths
eliminate performance bottlenecks by efficiently handling large address and data words. The 82541ER controller
includes advanced interrupt handling features to limit PCI bus traffic and a PCI interface that maximizes efficient
bus usage. The 82541ER uses efficient ring buffer descriptor data structures, with up to 64 packet descriptors cached
on chip. A large 64Kbyte on-chip packet buffer maintains superior performance as available PCI bandwidth
changes. In addition, using hardware acceleration, the controller offloads tasks from the host controller, such as
TCP/UDP/IP checksum calculations and TCP segmentation.
Both controllers can be enabled or disabled through the BIOS.
The pin out of Ethernet 1 RJ45 connector U13A can be seen on Table A12 and the pin out of Ethernet 2 RJ45
connector U14A can be seen on Table A13 .
Serial Ports
The Gator Mini-ITX can be configured with up to six fixed RS-232 serial ports (COM1 RS-422/485 optional).
COM1 and COM2 are standard, the others are optional.
The pin out of COM1 DB9 connector J19A can be seen on Table A9 , the pin out of COM2 DB9 connector J19B can
be seen on Table A10 , and the pin out of COM3-COM6 header connector J20(optional) can be seen on Table A11.
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