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TS68020DESC02YC View Datasheet(PDF) - Atmel Corporation

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TS68020DESC02YC
Atmel
Atmel Corporation Atmel
TS68020DESC02YC Datasheet PDF : 45 Pages
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The 18 addressing modes, shown in Table 8, include nine basic types:
• Register Direct
• Register Indirect
• Register Indirect with Index
• Memory Indirect
• Program Counter Indirect with Displacement
• Program Counter Indirect with Index
• Program Counter Memory Indirect
• Absolute
• Immediate
The register indirect addressing modes support postincrement, predecrement, offset,
and indexing. Programmers find these capabilities particularly useful for handling
advanced data structures common to sophisticated applications and high level lan-
guages. The program counter relative mode also has index and offset capabilities;
programmers find that this addressing mode is required to support position-independent
software. In addition to these addressing modes, the TS68020 provides data operand
sizing and scaling; these features provide performance enhancements to the
programmer.
.
Table 8. TS68020 Addressing Modes
Addressing Modes
Syntax
Register Direct
Data Register Direct
Dn
Address Register Direct
An
Register Indirect
Address Register Indirect
Address Register Indirect with Post Increment
Address Register Indirect with Predecrement
Address Register Indirect with Displacement
Register Indirect with Index
Address Register Indirect with Index (8-bit Displacement)
Address Register Indirect with Index (Base Displacement)
(An)
(An) +
– (An)
(d16An)
(d8, An, Xn)
(bd, An, Xn)
Memory Indirect
Memory Indirect Post-Indexed
Memory Indirect Pre-Indexed
([bd, An], Xn, od)
([bd, An, Xn], od)
Program Counter Indirect with Displacement
Program Counter Indirect with Index
PC Indirect with Index (8-bit Displacement)
PC Indirect with Index (Base Displacement)
(d16, PC)
(d8, PC, Xn)
(bd, PC, Xn)
Program Counter Memory Indirect
PC Memory Indirect Post-Indexed
PC Memory Indirect Pre-Indexed
([bd, PC], Xn, od)
([bd, PC, Xn]), od)
26 TS68020
2115A–HIREL–07/02
 

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