Usb; Ieee 1394; Pci To Pci Bridge Asic; Flash Prom - Sun Microsystems Sun Blade 100 Service Manual

C.2.5.2

USB

The PCIO-2 USB interface is an industry standard low-cost serial bus intended for
slower peripheral devices such as keyboard and mouse. The protocol on the USB is
of a master/slave polling nature with the following features:
OpenHCI Host Controller
1.5 and 12 Mb/s transfer rate
Four host ports
The Sun Blade 100 uses two USB ports for the keyboard and mouse.
See Appendix D for details.
C.2.5.3

IEEE 1394

The Sun Blade 100 provides a dual IEEE-1394 interface for faster asynchronous
peripheral devices of transfer rate up to 400Mb/s.
C.2.6

PCI to PCI Bridge ASIC

This ASIC provides the PCI bus extension for plug-in PCI devices and is compliant
with PCI Spec 2.1 and PCI Power Management Spec 1.0.
C.2.7

Flash PROM

The Sun Blade 100 motherboard contains 1 Mbyte of flash memory which is
connected to the EBus of the PCIO-2 ASIC. The flash PROM is an 8 Mbit, 5.0 volt
flash memory with faster than 120ns access time.
The 1 Mbyte of the PROM is divided into two halves, the OpenBoot PROM and the
Power-On Self Test (POST). The OpenBoot PROM and POST image reside in a
separate address space off of the EBus space. There is a ROMBO connector for
Appendix C Functional Description C-7