SH-ARC PCI
Manual
Version 01.00
1 Introduction
The SH-ARC PCI is an ARCNET card for use in PCs with a PCI bus[4].
The controller used is the COM20020[1] or COM20022[2] (named below
COM2002x). The card features a 32-Bit data bus and thus, enables high
transfer rates. There are two ARCNET interfaces available although they
cannot be used at the same time.
2 Features
PCI Bus
•
32 Bit Bus
•
PCI 2.1 compatible
•
PLX9052 chip by PLX
•
PCI compatible mechanical assembly
•
Mapping of the COM 2002x registers into the I/O space of the PC
RS485 Interface
•
9-pin Sub-D connector
•
Optically decoupled
•
Bit rate 19.5 kBit/s - 10 MBit/s
•
Integrated termination via dip switch
•
Protective circuit
Coax Interface
•
BNC jack
•
Suitable for RG-62 coax cable (93 Ohm impedance)
•
Bit rate 2.5 MBit/s (10 Mbit/s, when transceiver is available)
•
Protective circuit
ARCNET
•
COM20020 or COM20022 controller
•
Coax transceiver protected against invalid bitrate and mode
•
LED for backplane mode on/off
•
LED for ARCNET receiver activity
•
LED for ARCNET transmitter activity
•
LED for host access indication
•
Automatic switchover between RS485 and coax interface
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