TS68040 datasheet(33/49 Pages) ATMEL

33 / 49 page

TS68040

2116A–HIREL–09/02

Note:

DN =

Data register, D0-D7

AN =

Address register, A0-A7

8, d16

A twos-complement or sign-extended displacement; added as part of the effective address calculation;

size is 8 (d

8) or 16 (d16) bits; when omitted, assemblers use a value of zero.

Xn =

Address or data register used as an index register; form is Xn, SIZE*SCALE, where SIZE is W or L

(indicates index register size) and SCALE is 1, 2, 4 or 8 (index register os multiplied by SCALE); use of

SIZE and or SCALE is optional.

bd =

A twos-complement base displacement; when present, size can be 16 or 32 bits.

od =

Outer displacement added as part of effective address calculation after any memory indirection; use is

optional with a size of 16 or 32 bits.

PC =

Program counter.

(data)

Immediate value of 8, 16 or 32 bits.

( ) =

Effective address.

[ ]

Used as indirect address to long-word address.

–

Instruction Set Overview

Table 19. Addressing Modes

Addressing Modes

Syntax

Date Register Direct

Address Register Direct

Address Register Indirect

Address Register Indirect With Postincrement

Address Register Indirect With Predecrement

Address Register Indirect With Displacement

(An)

16, An)

Address Register Indirect With Index (8-bit Displacement)

Address Register Indirect With Index (Base Displacement)

8, An, Xn)

(bd, An, Xn)

Memory Indirect

Memory Indirect Postincrement

Memory Indirect Preindexed

([bd, An], Xn, od)

([bd, An, Xn], od)

Program Counter Indirect With Displacement

16, PC)

Program Counter Indirect With Index

PC Indirect With Index (8-bit Displacement)

PC Indirect With Index (Base Displacement

8, PC, Xn)

(bd, PC, Xn)

Program Counter Memory Indirect

PC Memory Indirect Postindexed

PC Memory Indirect Preindexed

([bd, PC], Xn, od)

([bd, PC, Xn], od)

Absolute

Absolute Short

Absolute Long

xxx.W

xxx.L

Immediate

# (data)

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