ADLINK Technology cPCI-3534, User Manual

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Introduction
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Introduction
1.1 About the Serial Communication Modules
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The serial communication modules are intelligent serial
input/output multi-port controller modules, which go with the new
generation of PC platform CompactPCI. The modules can reduce
the frequency for serial communication controller to interrupt main
CPU on the mainboard to improve the whole system performance.
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Traditionally, the serial communication controller will interrupt the
MPU character by character. This action will waste MPU
processing time and drop the system computing power. If the MPU
is processing some non-interrupted task, then the serial controller
will overrun and data lost.
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The serial communication interface series can support buffer
capability or local processor and dual port RAM in each port’s
transmit and receive channel simultaneously. This capability will
reduce the frequency of interrupt and increase the non-interrupt
task’s interval.
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The serial communication interface series use ASIC PCI controller
to interface the module to cPCI bus. The ASIC fully implement the
PCI local bus specification Rev. 2.1. All related bus configurations,
such as base memory address and interrupt assignment, are
automatically controlled by BIOS software. It does not need any
user interaction and pre-study for the configurations. This removes
the burden of searching for a conflict-free configuration.
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