w65c816s Microprocessor Data Sheet.pdf
w65c816s Microprocessor Data Sheet.pdf
w65c816s Microprocessor Data Sheet.pdf
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The Western Design Center, Inc.W65C816S <strong>Data</strong> <strong>Sheet</strong>TABLE OF CONTENTS1 INTRODUCTION ...........................................................................................................................72 W65C816S FUNCTIONAL DESCRIPTION.................................................................................82.1 Instruction Register (IR).......................................................................................................... 82.2 Timing Control Unit (TCU)...................................................................................................... 82.3 Arithmetic and Logic Unit (ALU)............................................................................................. 82.4 Internal Registers (Refer to Programming Model Table 2-2) ................................................... 82.5 Accumulator (A)....................................................................................................................... 82.6 <strong>Data</strong> Bank Register (DBR)....................................................................................................... 92.7 Direct (D) ................................................................................................................................. 92.8 Index (X and Y)........................................................................................................................ 92.9 Processor Status Register (P).................................................................................................... 92.10 Program Bank Register (PBR)................................................................................................. 92.11 Program Counter (PC)........................................................................................................... 102.12 Stack Pointer (S) .................................................................................................................... 103 PIN FUNCTION DESCRIPTION...............................................................................................133.1 Abort (ABORTB)................................................................................................................... 163.2 Address Bus (A0-A15)............................................................................................................ 163.3 Bus Enable (BE)..................................................................................................................... 163.4 <strong>Data</strong>/Bank Address Bus (D0-D7)............................................................................................ 163.5 Emulation Status (E).............................................................................................................. 173.6 Interrupt Request (IRQB)...................................................................................................... 173.7 Memory Lock (MLB)............................................................................................................. 173.8 Memory/Index Select Status (MX) ......................................................................................... 173.9 Non-Maskable Interrupt (NMIB)........................................................................................... 183.10 Phase 2 In (PHI2)................................................................................................................... 183.11 Read/Write (RWB)................................................................................................................. 183.12 Ready (RDY).......................................................................................................................... 183.13 Reset (RESB).......................................................................................................................... 193.14 Valid <strong>Data</strong> Address (VDA) and Valid Program Address (VPA)............................................. 193.15 VDD and VSS......................................................................................................................... 193.16 Vector Pull (VPB)................................................................................................................... 194 ADDRESSING MODES...............................................................................................................204.1 Reset and Interrupt Vectors ................................................................................................... 204.2 Stack ...................................................................................................................................... 204.3 Direct ..................................................................................................................................... 204.4 Program Address Space ......................................................................................................... 204.5 <strong>Data</strong> Address Space................................................................................................................ 20Absolute-a .........................................................................................................................................................................................21Absolute Indexed Indirect-(a,x) .....................................................................................................................................................21Absolute Indexed with X-a,x .........................................................................................................................................................21Absolute Indexed with Y-a,y .........................................................................................................................................................21Absolute Indirect-(a)........................................................................................................................................................................22Absolute Long Indexed With X-al,x.............................................................................................................................................22Absolute Long-al..............................................................................................................................................................................22Accumulator-A .................................................................................................................................................................................22The Western Design Center W65C816S 3
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