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3 Interface Devices and Mass-Storage Drives
SCSI / LAN Combo Board
SCSI / LAN Combo Board
Certain HP Kayak XA PC Workstations are supplied with an integrated
SCSI / 10BT/100TX LAN combo board. Because the SCSI / LAN combo
board includes two controllers, only one PCI slot is necessary for installing
this board. The PCI and SCSI controllers access the PCI bus through a PCI
bridge. The SCSI and PCI functionalities of the SYM8751SP are contained
within the Symbios Logic SYM5C875J PCI-SCSI I/O Processor chip.
The following hardware functional diagram shows the SCSI part of the SCSI/
LAN Combo board.
PCI Interface
The PCI interface operates as a 32-bit DMA bus master. The connection is
made through the edge connector. The signal definitions and pin numbers
conform to the PCI Local Bus Specification Revision 2.0 standard. The PCI
interface conforms to the PCI universal signaling environment for a 5 volt or
3.3 volt PCI bus.
PCI Bus
SCSI Controller
SYM53C875
Flash Memory
28F020
64KBytes
VPP Translator
12V
2KBytes
eeprom
24C16
Clock
Data
Osc.
40MHz
LED connector
(not loaded)
SCSI LED
PCI Bus
Termination H
50-pins high density
68-pins high density
To ExtStart Connector
External connector (8 bits)
Ext. Device Ext. Device
Termination L
Int. Device
Internal connector (16 bits)
Fuse 3A
Term. Power Term. Power
5V