Configuration Basics
2-10
Am186™CC/CH/CU Microcontrollers User’s Manual
Combinations of the above three address elements define the following six memory
addressing modes (see Table 2-5 for examples).
■
Direct Mode: The instruction contains the operand offset as an 8-bit or 16-bit
displacement element.
■
Register Indirect Mode: The operand offset is in one of the following registers: SI, DI,
BX, or BP.
■
Based Mode: The operand offset is the sum of an 8-bit or 16-bit displacement and the
contents of a base register (BX or BP).
■
Indexed Mode: The operand offset is the sum of an 8-bit or 16-bit displacement and
the contents of an index register (SI or DI).
■
Based Indexed Mode: The operand offset is the sum of the contents of a base register
and an index register.
■
Based Indexed Mode with Displacement: The operand offset is the sum of a base
register’s contents, an index register’s contents, and an 8-bit or 16-bit displacement.
Table 2-5
Memory Addressing Mode Examples
Addressing Mode
Example
Direct
mov ax, ds:4
Register Indirect
mov ax, [si]
Based
mov ax, [bx]4
Indexed
mov ax, [si]4
Based Indexed
mov ax, [si][bx]
Based Indexed with Displacement
mov ax, [si][bx]4
Summary of Contents for Am186 CC
Page 1: ...Am186 CC CH CU Microcontrollers User s Manual Order 21914B...
Page 4: ...iv Am186 CC CH CU Microcontrollers User s Manual...
Page 18: ...Table of Contents xviii Am186 CC CH CU Microcontrollers User s Manual...
Page 24: ...Introduction xxiv Am186 CC CH CU Microcontrollers User s Manual...
Page 40: ...Architectural Overview 1 16 Am186 CC CH CU Microcontrollers User s Manual...
Page 86: ...System Overview 3 36 Am186 CC CH CU Microcontrollers User s Manual...
Page 92: ...Emulator Support 4 6 Am186 CC CH CU Microcontrollers User s Manual...
Page 112: ...DRAM Controller 6 8 Am186 CC CH CU Microcontrollers User s Manual...
Page 134: ...Interrupts 7 22 Am186 CC CH CU Microcontrollers User s Manual...
Page 186: ...Programmable I O Signals 9 8 Am186 CC CH CU Microcontrollers User s Manual...
Page 200: ...Watchdog Timer 11 6 Am186 CC CH CU Microcontrollers User s Manual...
Page 232: ...Asynchronous Serial Ports UARTs 13 24 Am186 CC CH CU Microcontrollers User s Manual...
Page 242: ...Synchronous Serial Port SSI 14 10 Am186 CC CH CU Microcontrollers User s Manual...
Page 264: ...High Level Data Link Control HDLC 15 22 Am186 CC CH CU Microcontrollers User s Manual...
Page 332: ...Universal Serial Bus USB 18 34 Am186 CC CH CU Microcontrollers User s Manual...
Page 348: ...Register Summary A 16 Am186 CC CH CU Microcontrollers User s Manual...
Page 376: ...Index Index 18 Am186 CC CH CU Microcontrollers User s Manual...