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 

AT/TSC8x251G2D

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

states (N: number of wait states).

Table 21. Summary of Increment and Decrement Instructions

IncrementINC <dest>dest opnd ← dest opnd + 1

IncrementINC <dest>, <src>dest opnd ← dest opnd + src opnd

DecrementDEC <dest>dest opnd ← dest opnd - 1

DecrementDEC <dest>, <src>dest opnd ← dest opnd - src opnd

Mnemonic

<dest>,

<src>(1)

Comments

Binary Mode Source Mode

Bytes States Bytes States

A

ACC by 1

1

1

1

1

Rn

Register by 1

1

1

2

2

INC

DEC

dir8

Direct address (on-chip RAM or

SFR) by 1

2

2(2)

2

2(2)

at Ri

Indirect address by 1

1

3

2

4

INC

DEC

Rm, #short

WRj, #short

Byte register by 1, 2, or 4

Word register by 1, 2, or 4

3

2

2

1

3

2

2

1

INC

DRk, #short Double word register by 1, 2, or 4

3

4

2

3

DEC

DRk, #short Double word register by 1, 2, or 4

3

5

2

4

INC

DPTR

Data pointer by 1

1

1

1

1

Notes: 1. A shaded cell denotes an instruction in the C51 Architecture.

2. If this instruction addresses an I/O Port (Px, x = 0-3), add 2 to the number of states.

Add 3 if it addresses a Peripheral SFR.

25

4135F–8051–11/06

Share Link: