AT80251G2D-3CSUM(2006) View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT80251G2D-3CSUM
(Rev.:2006)

8/16-bit Microcontroller with Serial Communication Interfaces

Atmel Corporation 

Table 22. Summary of Compare Instructions

CompareCMP <dest>, <src>dest opnd - src opnd

<dest>,

Mnemonic <src>(2)

Comments

Rmd, Rms Register with register

WRjd,

WRjs

Word register with word register

DRkd,

DRks

Dword register with dword register

Rm, #data Register with immediate data

WRj,

#data16

Word register with immediate 16-bit data

CMP

DRk,

#0data16

DRk,

#1data16

Dword register with zero-extended 16-bit

immediate data

Dword register with one-extended 16-bit

immediate data

Rm, dir8

Direct address (on-chip RAM or SFR) with

byte register

WRj, dir8

Direct address (on-chip RAM or SFR) with

word register

Rm, dir16 Direct address (64K) with byte register

WRj, dir16 Direct address (64K) with word register

Rm, at WRj Indirect address (64K) with byte register

Rm, at DRk Indirect address (16M) with byte register

Binary Mode Source Mode

Bytes States Bytes States

3

2

2

1

3

3

2

2

3

5

2

4

4

3

3

2

5

4

4

3

5

6

4

5

5

6

4

5

4

3(1)

3

2(1)

4

4

3

3

5

3(2)

4

2(2)

5

4(3)

4

3(3)

4

3(2)

3

2(2)

4

4(2)

3

3(2)

Notes:

1. If this instruction addresses an I/O Port (Px, x = 0-3), add 1 to the number of states.

Add 2 if it addresses a Peripheral SFR.

2. If this instruction addresses external memory location, add N+2 to the number of

states (N: number of wait states).

3. If this instruction addresses external memory location, add 2(N+2) to the number of

states (N: number of wait states).

26 AT/TSC8x251G2D

4135F–8051–11/06

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