Fastcom RS-422, Справочник по аппаратуре, Страница: 9 / 20

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INTRODUCTION
The Fastcom: 422/2-PCI adapter is the fastest, most advanced two-channel RS-422/485 adapter in the industry.
Primarily designed for commercial, industrial, and OEM applications, the Fastcom: 422/2-PCI
features two
discrete RS-422/485 channels, complete with RTS and CTS hand-shaking signals for each channel.
The advanced universal asynchronous receiver and transmitter (UART) chips used on the Fastcom: 422/2-PCI
are fully register compatible with standard 16C550 UARTs, but
provide extraordinary 128 byte FIFOs for
receive and transmit buffering. This buffering is extremely valuable when working with RS-422/485
communications within high-overhead operating systems such as Windows NT and Windows 98. The two
advanced UARTs on the Fastcom: 422/2-PCI are each capable of all standard baud rates
plus a high-speed
mode capable of up to an amazing 1.5 Mbaud.
Software drivers for Windows 98/NT/2000/XP and Linux are supplied. Multiple Fastcom: 422/2-PCI adapters can
be installed in all operating systems.
The Fastcom RS-422-PCI family also includes the four-channel Fastcom: 422/4-PCI and the isolated ground
single-channel Fastcom: IG422/1-PCI. ISA bus versions are also available.
The following is the basic structure of the Fastcom: 422/2-PCI:
RS-422
RS-485
DB9
DRIVERS /
RECEI
VERS
PCI
INTERFACE
CONTROLLER
CLOCK
CONTROL
REGISTER
422/485
CONTROL
REGISTER
PCI BUS
CS
A0-A2
DATA
INTERRUPT
CLOCK
TX
RX
RTS
CTS