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US7B13AS17K Datasheet(PDF) 8 Page - NEC |
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US7B13AS17K Datasheet(HTML) 8 Page - NEC |
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8 / 289 page  – iii – CHAPTER 8 GENERAL REGISTER (GR) ........................................................................................ 69 8.1 GENERAL REGISTER CONFIGURATION ........................................................................ 69 8.2 FUNCTIONS OF THE GENERAL REGISTER .................................................................. 69 CHAPTER 9 REGISTER FILE (RF) ................................................................................................... 71 9.1 REGISTER FILE CONFIGURATION ................................................................................. 71 9.1.1 Configuration of the Register File ...................................................................................... 71 9.1.2 Relationship between the Register File and Data Memory .............................................. 71 9.2 FUNCTIONS OF THE REGISTER FILE ............................................................................ 72 9.2.1 Functions of the Register File ............................................................................................ 72 9.2.2 Control Register Functions ................................................................................................. 72 9.2.3 Register File Manipulation Instructions .............................................................................. 73 9.3 CONTROL REGISTER ....................................................................................................... 75 9.4 CAUTIONS ON USING THE REGISTER FILE ................................................................. 75 9.4.1 Concerning Operation of the Control Register (Read-Only and Unused Registers) ........ 75 9.4.2 Register File Symbol Definitions and Reserved Words .................................................... 76 CHAPTER 10 DATA BUFFER (DBF)................................................................................................ 79 10.1 DATA BUFFER CONFIGURATION ................................................................................... 79 10.2 FUNCTIONS OF THE DATA BUFFER.............................................................................. 80 10.2.1 Data Buffer and Peripheral Hardware ................................................................................ 81 10.2.2 Data Transfer with Peripheral Hardware ............................................................................ 82 10.2.3 Table Reference .................................................................................................................. 83 CHAPTER 11 ARITHMETIC AND LOGIC UNIT ............................................................................. 85 11.1 ALU BLOCK CONFIGURATION ....................................................................................... 85 11.2 FUNCTIONS OF THE ALU BLOCK .................................................................................. 85 11.2.1 Functions of the ALU .......................................................................................................... 85 11.2.2 Functions of Temporary Registers A and B ....................................................................... 90 11.2.3 Functions of the Status Flip-flop ......................................................................................... 90 11.2.4 Performing Operations in 4-Bit Binary ................................................................................ 91 11.2.5 Performing Operations in BCD ........................................................................................... 91 11.2.6 Performing Operations in the ALU Block ........................................................................... 93 11.3 ARITHMETIC OPERATIONS (ADDITION AND SUBTRACTION IN 4-BIT BINARY AND BCD) ........................................................................................................... 94 11.3.1 Addition and Subtraction When CMP=0 and BCD=0 ......................................................... 95 11.3.2 Addition and Subtraction When CMP=1 and BCD=0 ......................................................... 95 11.3.3 Addition and Subtraction When CMP=0 and BCD=1 ......................................................... 95 11.3.4 Addition and Subtraction When CMP=1 and BCD=1 ......................................................... 96 11.3.5 Cautions on Use of Arithmetic Operations .......................................................................... 96 11.4 LOGICAL OPERATIONS ................................................................................................... 96 11.5 BIT JUDGEMENT .............................................................................................................. 97 11.5.1 TRUE (1) Bit Judgement ..................................................................................................... 98 11.5.2 FALSE (0) Bit Judgement .................................................................................................... 98 |
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