W65C816S Datasheet, PDF (3/62 Pages) List of Unclassifed Manufacturers – Microprocessor

The Western Design Center, Inc.
W65C816S Data Sheet
TABLE OF CONTENTS
1 INTRODUCTION ........................................................................................................................... 7
2 W65C816S FUNCTIONAL DESCRIPTION................................................................................. 8
2.1 Instruction Register (IR).......................................................................................................... 8
2.2 Timing Control Unit (TCU)...................................................................................................... 8
2.3 Arithmetic and Logic Unit (ALU)............................................................................................. 8
2.4 Internal Registers (Refer to Programming Model Table 2-2) ................................................... 8
2.5 Accumulator (A)....................................................................................................................... 8
2.6 Data Bank Register (DBR)....................................................................................................... 9
2.7 Direct (D) ................................................................................................................................. 9
2.8 Index (X and Y) ........................................................................................................................ 9
2.9 Processor Status Register (P).................................................................................................... 9
2.10 Program Bank Register (PBR)................................................................................................. 9
2.11 Program Counter (PC)........................................................................................................... 10
2.12 Stack Pointer (S) .................................................................................................................... 10
3 PIN FUNCTION DESCRIPTION ............................................................................................... 13
3.1 Abort (ABORTB)................................................................................................................... 16
3.2 Address Bus (A0-A15)............................................................................................................ 16
3.3 Bus Enable (BE)..................................................................................................................... 16
3.4 Data/Bank Address Bus (D0-D7)............................................................................................ 16
3.5 Emulation Status (E).............................................................................................................. 17
3.6 Interrupt Request (IRQB)...................................................................................................... 17
3.7 Memory Lock (MLB)............................................................................................................. 17
3.8 Memory/Index Select Status (MX) ......................................................................................... 17
3.9 Non-Maskable Interrupt (NMIB)........................................................................................... 18
3.10 Phase 2 In (PHI2)................................................................................................................... 18
3.11 Read/Write (RWB)................................................................................................................. 18
3.12 Ready (RDY).......................................................................................................................... 18
3.13 Reset (RESB).......................................................................................................................... 19
3.14 Valid Data Address (VDA) and Valid Program Address (VPA)............................................. 19
3.15 VDD and VSS......................................................................................................................... 19
3.16 Vector Pull (VPB)................................................................................................................... 19
4 ADDRESSING MODES ............................................................................................................... 20
4.1 Reset and Interrupt Vectors ................................................................................................... 20
4.2 Stack ...................................................................................................................................... 20
4.3 Direct ..................................................................................................................................... 20
4.4 Program Address Space ......................................................................................................... 20
4.5 Data Address Space................................................................................................................ 20
Absolute-a .........................................................................................................................................................................................21
Absolute Indexed Indirect-(a,x) .....................................................................................................................................................21
Absolute Indexed with X-a,x .........................................................................................................................................................21
Absolute Indexed with Y-a,y .........................................................................................................................................................21
Absolute Indirect-(a)........................................................................................................................................................................22
Absolute Long Indexed With X-al,x.............................................................................................................................................22
Absolute Long-al..............................................................................................................................................................................22
Accumulator-A .................................................................................................................................................................................22
The Western Design Center
W65C816S
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