Appendix C: Industrial Devices
Appendix C
On-Board Industrial Devices
The Phoenix MicroATX Express offers one or two Gigabit Ethernet controller and up to six serial ports (one
optional RS422/485). The Phoenix MicroATX Express also offers three other On-Board Industrial devices:
Watchdog timer, Hardware health monitor and a Post Code display that will help you on troubleshooting.
Post Code Display
The POST code display is a device implemented on the Phoenix MicroATX Express to help on failure diagnostics.
A POST code is transmitted by the BIOS during the POST (Power On Self Test). It is a number that refers to the
state or test condition of a circuit or group of circuits. Knowing the results of these tests (hence the POST code) can
be very important in debugging a system.
POST Checkpoint Codes
When AMIBIOS8 performs the Power On Self Test, it writes diagnostic codes checkpoint codes to I/O port 0080h
where the POST code display is connected. Please, refer to Appendix B for POST codes description.
On-board Ethernet
The Phoenix MicroATX Express features one or optionally two Gigabit Ethernet controllers. The Ethernet controller
is an Intel 82573L.
PCIe
— x1 PCIe interface
— Peak bandwidth: 2 Gb/s per direction
— Power management
— High bandwidth density per pin
MAC
— Optimized transmit and receive queues
— IEEE 802.3x compliant flow control with software controlled pause times and threshold values
— Caches up to 64 packet descriptors per queue
— Programmable host memory receive buffers (256 bytes to 16 KB) and cache line size (16 bytes to 256 bytes)
— 32 KB configurable transmit and receive FIFO buffer
— Mechanism available for reducing interrupts generated by transmit and receive operation
— Descriptor ring management hardware for transmit and receive
— Optimized descriptor fetching and write-back mechanisms
— Wide, pipelined internal data path architecture
PHY
— Integrated PHY for 10/100/1000 Mb/s full and half duplex operation
— IEEE 802.3ab auto negotiation support
— IEEE 802.3ab PHY compliance and compatibility
— DSP architecture implements digital adaptive equalization, echo cancellation, and cross-talk cancellation
Host Offloading
— Transmit and receive IP, TCP and UDP checksum off-loading capabilities
— Transmit TCP segmentation, IPv6 offloading, and advanced packet filtering
— IEEE 802.1q VLAN support with VLAN tag insertion, stripping and packet filtering for up to 4096 VLAN tags
— Descriptor ring management hardware for transmit and receive
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Summary of Contents for MicroATX Express
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