Measurement Computing COM232/8AT User Manual
Page 2
2 COM232/8AT User’s Guide
March 1998
1000-0901, rev 1.1
Contents
Overview ..........................................................................................................................................3
Specifications .................................................................................................................................3
Addressing .......................................................................................................................................4
Interrupts ..........................................................................................................................................5
Scratchpad or Interrupt ID Register Selection ..............................................................................5
Output Configurations ....................................................................................................................7
Register Definitions.........................................................................................................................8
Interrupt Enable Register.........................................................................................................8
Interrupt Identification Register ..............................................................................................9
FIFO Control Register ............................................................................................................10
Line Control Register .............................................................................................................11
MODEM Control Register.......................................................................................................12
Line Status Register...............................................................................................................13
MODEM Status Register.........................................................................................................14
Scratchpad Register (Interrupt ID Register not accessible)...............................................14
Interrupt ID Register (Scratchpad Register not accessible)...............................................14
FIFO Interrupt Mode Operation.....................................................................................................15
Divisor Latch Settings for Common Baud Rates........................................................................15
Installation for Systems with Windows95
TM
................................................................................16
Installation for Systems with WindowsNT
TM
Version 4.0 ...........................................................18
Warranty
Your IOtech warranty is as stated on the product warranty card. You may contact IOtech by phone, fax machine, or e-
mail in regard to warranty-related issues.
Phone: (440) 439-4091, fax: (440) 439-4093, e-mail:
Limitation of Liability
The COM232/8AT has been thoroughly tested and the documentation reviewed. However, IOtech does not warrant the
performance of the product for any particular purpose. In no event is IOtech liable for any damages resulting, directly or
indirectly, from the use of this product.
ESD Caution
This ESD caution symbol urges proper handling of equipment or components sensitive to damage from
electrostatic discharge. Proper handling guidelines include the use of grounded anti-static mats and wrist
straps, ESD-protective bags and cartons, and related procedures.
Copyright Notice
COM232/8AT documentation and printed circuit board are copyright with all rights reserved by IOtech, Inc., Cleveland,
Ohio, USA. No part of this product may be copied, reproduced or transmitted by any mechanical, photographic,
electronic or other method without prior written consent of IOtech, Inc.
Copyright © IOtech Inc. 1997, All Rights Reserved. IOtech, Inc. 25971 Cannon Road, Cleveland, Ohio 44146
COM232/8AT is a trademark of IOtech, Inc.