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Introduction
Product Overview
The CM17320HR is designed to provide eight independent PCI serial ports with RS-232, RS-422,
or RS-485 interfaces for PC/104-
Plus
based systems.
Board Features
o
Eight versatile serial port interfaces
Jumper-selectable RS-232, RS-422 drivers always enabled, RS-485 with
RTS driver enable and RS-485 with inverted RTS driver enable operation
Supports all standard RS-232 serial port signals (RTS, CTS, etc).
Functionally compatible with standard PC 16C550 UARTs
o
Exar XR17D158 Octal PCI UART
32-bit PCI target
16C550 compatible 5G register set
64 byte transmit and receive FIFOs
Programmable date rate with prescaler
14.7456 MHz crystal
Standard PC serial port baud rates supported
Up to 921,600 baud RS-422/485 (prescaler = 1)
Up to 230,400 baud RS-232 (prescaler = 4)
o
User oscillator option
Enables support for non-standard baud rates up to 6.25 Mbps
+3.3 V or 5 V Oscillators, 50 MHz max
8-pin DIP package (4 pins used)
Board may be ordered with a custom oscillator preinstalled.
o
PC/104-
Plus
compliant
Universal (3.3V or 5.0V) PCI signaling
I/O Interfaces
o
Eight 10-pin DIL serial port connectors
0.1” Pin Spacing
Can be cabled directly to a 9-pin “D” connector
o
PC/104
-Plus
(PCI) stack-through bus connector
o
PC/104 (ISA) stack-through bus connector
Available Options
The CM17320HR may be purchased as either a board-level product, or as an IDAN module for
integration into an RTD IDAN system. Cable kits are also available.
Part Number
Description
CM17320HR
Octal Serial Port Peripheral Module
CM17320HR-xxx.xxxMHz
CM17320HR with pre-installed oscillator for custom
baud rates
(xxx.xxx specifies the frequency)
