Microcontrollers in Practice
Packed with hundreds of practical examples and exercises to foster mastery of concepts and details, this practical guide provides readers with hands-on knowledge of how to implement three families of microcontrollers.
TABLE OF CONTENTS Microcontrollers in Practice
A.11: 8051 Instruction Set
A.11 8051 Instruction Set
Arithmetic Instructions
| Mnemonic | Operation | Description | Flags | |
|---|---|---|---|---|
| ADD | A,R n | Add register to Accumulator | A ? A + R n | C,OV,AC |
| ADD | A.direct | Add direct byte to Accumulator | A ? A + direct | C,OV,AC |
| ADD | A,@R i | Add indirect RAM to Accumulator | A ? A + (R i) | C,OV,AC |
| ADD | A,#data | Add immediate data to Accumulator | A ? A + data | C,OV,AC |
| ADDC | A,R n | Add register to Accumulator with Carry | A ? A + R n + C | C,OV,AC |
| ADDC | A.direct | Add direct byte to Accumulator with Carry | A ? A + direct + C | C,OV,AC |
| ADDC | A,@R i | Add indirect RAM to Accumulator with Carry | A ? A + (R i) + C | C,OV,AC |
| ADDC | A,#data | Add immediate data to Acc with Carry | 2A ? A + data + C | C,OV,AC |
| SUBB | A,R n | Subtract Register from Acc with borrow | A ? A - R n - C | C,OV,AC |
| SUBB | A.direct | Subtract direct byte from Acc with borrow | A ? A - direct - C | C,OV,AC |
| SUBB | A,@R i | Subtract indirect RAM from Acc with borrow | A ? A - (R i) - C | C,OV,AC |
| SUBB | A,#data | Substract immediate data from Acc with borrow | A ? A - data - C | C,OV,AC |
| INC | A | Increment Accumulator | A ? A + 1 | |
| INC | R n | Increment register | R n ? R n + 1 |
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