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Preface The MVME334B Multiprotocol Communications Module User’s Manual describes the installation, components, and configurations of the MVME334B. The documents should be used by anyone who wants general as well as technical information about the MVME334B. Related Documentation The following publications are applicable to the MVME334B and may provide additional helpful information. If not shipped with this product, they may be purchased by contacting your local Motorola sales office. Non-Motorola documents may be obtained from the sources listed. Document Title Motorola Publication Number MVME334ABug Debugging Package User's Manual MVME334ABUG MVME709-1/ -2 Three Channel Transition Module User's Manual MVME709-1/ -2 MVME709-1/ -2 Three Channel Transition Module Support Information SIMVME709-1/ -2 MC68605 X.25 Protocol Controller (XPC) User’s Manual MC68605UM MC68020 32-Bit Microprocessor User's Manual MC68020UM NOTE: Although not shown in the above list, each Motorola Computer Group manual publication number is suffixed with characters which represent the revision level of the document, such as / D2 or / UM1 (the second revision of a manual); a supplement bears the same number as the manual but has a suffix such as / A1 or / UM2A1 (the first supplement to the manual). The following publications are available from the sources indicated. ANSI/ IEEE Std. 1014-1987 Versatile Backplane Bus: The Institute of Electrical and Electronics Engineers, Inc., 345 East 47th Street, New York, NY 10017, USA. (VMEbus specification) SCN68562 Dual Universal Serial Communications Controller (DUSCC) Data Sheet; Signetics Corporation, 811 E. Arques Avenue, P.O Box 3409, Sunnyvale, CA 94088-3409. 8254 Programmable Interval Timer Data Sheet; Intel Corporation, 3065 Bowers Avenue, Santa Clara, CA 95051. HD63450 DMA Controller Data Sheet; Hitachi America, Ltd., Semiconductor IC Division, 2000 Sierra Point Parkway, Brisbane, CA 94005-1819. Manual Terminology Throughout this manual, a convention has been maintained whereby data and address parameters are preceded by a character which specifies the numeric format as follows: $ dollar specifies a hexadecimal number % percent specifies a binary number ampersand specifies a decimal number Unless otherwise specified, all address references are in hexadecimal throughout this manual. An asterisk (*) following the signal name for signals which are level significant denotes that the signal is true or valid when the signal is low. An asterisk (*) following the signal name for signals which are edge significant denotes that the actions initiated by that signal occur on high to low transition. In this manual, assertion and negation are used to specify forcing a signal to a particular state. In particular, assertion and assert refer to a signal that is active or true; negation and negate indicate a signal that is inactive or false. These terms are used independently of the voltage level (high or low) that they represent