EZ-USB v 1.9 Appendices
Table of Contents
Appendix A: 8051 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
A.1
A.2
A.3
A.4
A.5
A.6
Introduction ............................................................................................ A-1
8051 Features ......................................................................................... A-1
Performance Overview .......................................................................... A-2
Software Compatibility .......................................................................... A-3
803x/805x Feature Comparison ............................................................. A-4
8051 Core/DS80C320 Differences ........................................................ A-5
A.6.1 Serial Ports ....................................................................................... A-5
A.6.2 Timer 2 ............................................................................................. A-5
A.6.3 Timed Access Protection ................................................................. A-5
A.6.4 Watchdog Timer .............................................................................. A-5
Appendix B: 8051 Architectural Overview . . . . . . . . . . . . . . . . . . . . . . B-1
B.1
Introduction .............................................................................................B-1
B.1.1 Memory Organization .......................................................................B-2
B.1.1.1 Program Memory .....................................................................B-2
B.1.1.2 External RAM ..........................................................................B-2
B.1.1.3 Internal RAM ...........................................................................B-2
B.1.2 Instruction Set ...................................................................................B-3
B.1.3 Instruction Timing ............................................................................B-9
B.1.4 CPU Timing ....................................................................................B-10
B.1.5 Stretch Memory Cycles (Wait States) ............................................B-10
B.1.6 Dual Data Pointers ..........................................................................B-11
B.1.7 Special Function Registers ..............................................................B-12
Appendix C: 8051 Hardware Description . . . . . . . . . . . . . . . . . . . . . . . C-1
C.1
C.2
Introduction .............................................................................................C-1
Timers/Counters ......................................................................................C-1
C.2.1 803x/805x Compatibility ..................................................................C-2
C.2.2 Timers 0 and 1 ..................................................................................C-2
C.2.3 Mode 0 ..............................................................................................C-2
C.2.4 Mode 1 ..............................................................................................C-3
C.2.5 Mode 2 ..............................................................................................C-6
C.2.6 Mode 3 ..............................................................................................C-7
C.2.7 Timer Rate Control ...........................................................................C-8
EZ-USB TRM v1.9
Table of Contents
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