Rainbow-electronics AT89C2051 Manuale Utente Scaricare il pdf (Pagina 11)

Microcontroller

5-57

Table 7.

Miscellaneous Instructions

Note: 1. ALT obtains the remainder after DIV and obtains the high word after a multiply. This instruction must be executed immedi-

ately after the MUL or DIV.

Name Description

CLR Zero ACC

COM Complement ACC (ACC = ACC XOR FFFF)

NEG Negate ACC (ACC = 0 - ACC)

NOT ACC = 1 if ACC was 0, else ACC = 0

INC Increment ACC

DEC Decrement ACC

TAI Copy ACC to INDEX

TIA Copy INDEX to ACC

ADAI Add ACC to INDEX

ALT Get alternate result from MUL/DIV

OUT Output byte in ACC to PORT

IN Read byte from PORT

SYS System interface function

1 2 ... 6 7 8 9 10 11

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Rainbow-electronics AT89C2051 Manuale Utente Pagina 11