C-34 Sun Blade 1500 Service, Diagnostics, and Troubleshooting Manual • December 2004
C.7.6 IEEE 1394/USB 2 Combination Card
Supported in standard Sun Blade 1500 configurations, the IEEE 1394/USB 2.0
combination (combo) card adds three USB ports compliant to the USB 2.0 standard.
These ports provide 480 Mbps throughput. The card also has two IEEE 1394A ports
for additional connectivity at 400 Mbps throughput.
C.7.7 Ethernet
The BD5703C Gigabit Ethernet controller on the Sun Blade 1500 motherboard
provides the MAC and PHY functionality to support one twisted pair Ethernet (TPE)
RJ-45 connector at the back of the system. There are two LEDs at the TPE connector,
an amber and a green.
TABLE C-11 list the functions of these LEDs.
C.7.8 Parallel
The M1535D+ provides the Sun Blade 1500 workstation with a parallel port capable
of ECP, EPP, and SPP modes, and compliant to IEEE 1284 standards.
C.7.9 Serial
The M1535D+ I/O subsystem supports 2 serial ports having 16450 and 16550
compatible UARTs with 16-byte FIFO buffers.The UARTs are baud rate
programmable and provide dedicated pins for infrared transmissions.
When powering off, the Sun Blade 1500 workstation sends a BREAK signal out the
serial ports. This break could interfere with the workstation controlling a server
through a TIP connection. Four solutions are available:
■ Configure for an alternate BREAK key sequence on the server.
■ “Filter” the TIP connection through a network terminal concentrator
■ Disable the keyboard abort on the server
■ Disable the TIP connection on the server
TABLE C-11 TPE LED Status
LED Status
Amber - Link When illuminated, a 10/100/1000 Mbps link exists.
Green - Activity When flashing, indicates transmit or receive activity.
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