AT89LP213 datasheet(59/90 Pages) ATMEL

59 / 90 page

3538A–MICRO–7/06

AT89LP213/214 [Preliminary]

21. Instruction Set Summary

The AT89LP213/214 is fully binary compatible with the MCS-51 instruction set. The difference

between the AT89LP213/214 and the standard 8051 is the number of cycles required to execute

an instruction. Instructions in the AT89LP213/214 may take 1, 2, 3 or 4 clock cycles to complete.

The execution times of most instructions may be computed using Table 21-1.

Table 21-1.

Instruction Execution Times and Exceptions

Generic Instruction Types

Cycle Count Formula

Most arithmetic, logical, bit and transfer instructions

# bytes

Branches and Calls

# bytes + 1

Single Byte Indirect (i.e. ADD A, @Ri, etc.)

RET, RETI

MOVC

MOVX

MUL

DIV

INC DPTR

Arithmetic

Bytes

Clock Cycles

Hex Code

8051

AT89LP

ADD A, Rn

28-2F

ADD A, direct

ADD A, @Ri

26-27

ADD A, #data

ADDC A, Rn

38-3F

ADDC A, direct

ADDC A, @Ri

36-37

ADDC A, #data

SUBB A, Rn

98-9F

SUBB A, direct

SUBB A, @Ri

96-97

SUBB A, #data

INC Rn

08-0F

INC direct

INC @Ri

06-07

INC A

DEC Rn

18-1F

DEC direct

DEC @Ri

16-17

DEC A

AT89LP213 Datasheet(PDF) 59 Page - ATMEL Corporation

AT89LP213 Datasheet(HTML) 59 Page - ATMEL Corporation

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