ABB DSQC318 3HAB2221-1 Memory Expansion Board

ABB DSQC318 3HAB2221-1 Memory Expansion Board

Unless otherwise specified, all address references are in hexadecimal. 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. Data and address sizes are defined as follows: ❏ A byte is eight bits, numbered 0 through 7, with bit 0 being the least significant.A two-byte is 16 bits, numbered 0 through 15, with bit 0 being the least significant. For the MVME162 and other CISC modules, this is called a word.

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