Impulse 3542 - Manual (Page 3)

© Sealevel Systems, Inc. -1- SIO4-104.232 User Manual
Introduction
SIO4-104.232
The SIO4-104.232, Item Number 3542, is a PC/104 module that provides four RS-232 serial
interface ports. The board is designed using the XR16C554 UART, which provides a 16-byte
FIFO. The RS-232 compatibility allows for connection to devices utilizing the RS-232 electrical
interface, such as modems, and data-entry terminals.
In addition to the standard XR16C554 UART, the XR16C854 (‘SE’ option) and the OX16C954
(‘SN’ option) are available. Both UARTS feature enhanced FIFOs (128 byte transmit and
receive) and both maintain compatibility with the XR16C554. The OX16C954 additionally
features a flexible clock prescalar (from 1 to 31.875), 9 bit protocol, and an isochronous mode.
The SIO4-104.232 is designed to be used with a variety of Operating Systems including
Windows 98/NT/ME/2000/XP, Linux and DOS. The SeaCOM API (Application Programmer
Interface) included on CD with the SIO4-104.232 provides a variety of useful high-level function
calls implemented as a Windows dynamic link library (DLL) and as a Linux kernel module and
library. In addition to the API, SeaCOM includes sample code and utilities to simplify software
development.
Other Sealevel PC104 Serial Interface Products
• ULTRA SIO-104
(Item Number 3550) - Single Port RS-422/485
• SIO-104
(Item Number 3551) - Single Port RS-232
• SIO.104+2
(Item Number 3502) - Dual Port RS-232/422/485
• C4-104.ULTRA
(Item Number 3540) - Four Port RS-232/422/485
• SIO4-104.485
(Item Number 3543) - Four Port RS-422/485
• SIO4-104.2+2
(Item Number 3544) - Two Port RS-232 / Two Port 422/485