Sun Microsystems SPARCengine Ultra AXi - Ethernet Port; External and Internal SCSI Interface; Floppy Drive; PCI Bus Connectors

3-8 SPARCengine Ultra AX i OEM Technical Manual • May 1999
3.3.10 Floppy Drive
One 3.5 inch, 1.44MB floppy drive is supported. Only manual eject is supported.
Super IO chip NS87307 provides the interface circuitry.
3.3.11 Ethernet Port
The Ethernet interface is a twisted pair type using an RJ45 connector at the rear
panel. The interface incorporates an auto negotiate feature to auto-detect 10Mbits/
sec. or 100Mbits/sec. bit rate and will auto-configure itself on the fly. See A.3.12 on
page A-24 for pin-out details. Sun ASIC PCIO STP2003QFP provides the circuitry to
support this function. A National DP83840A is used as a physical layer device (PHY)
for Ethernet 10BASE-T and 100BASE-T using category 5 unshielded, twisted pair
cables.
3.3.12 External and Internal SCSI Interface
The Ultra AXi fully implements SCSI on an UltraWide 16-bit bus which supports
transfer rates up to 40MB/sec. The SCSI connectors are 68-pin Amp type, single-
ended signals with an active terminator mounted on the motherboard. See A.3.7 on
page A-19 and A.3.8 on page A-20. Each SCSI cable requires a terminator on the last
device. SCSI is implemented with Character mode, Block mode DMA and single
initiator supports. There is extensive Solaris support for a wide variety of devices
such as hard disks, CD-ROMs and tape drives. Symbios chip SYM53C876 provides
the dual channel SCSI support.
3.3.13 PCI Bus Connectors
There are six PCI slots provided. All the slots are similar, they are 33 MHz, 32-bit, 5V
only. PCI slots 1, 2, 3 are on the internal PCI-A bus segment and PCI slots 4, 5, 6 are
on the PCI-B bus segment. See FIGURE A-1 on page A-2. All 6 PCI slots are identical
in characteristics. The PCI Bus is compliant with PCI 2.1 specification.
Note – If the FFB2 board is used, it blocks one PCI slot, leaving five usable slots.