Division
| Instruction | DIV AB |
|---|---|
| Function | Divide |
| Bytes | 1 |
| Cycles | 4 |
| Encoding | 1 0 0 0 0 1 0 0 |
| Operation | AB = A / B |
| Description | DIV AB divides the unsigned eight-bit integer in the Accumulator by the unsigned eight-bit integer in register B. The Accumulator receives the integer part of the quotient; register B receives the integer remainder. The carry and OV flags are cleared. Exception: if B had originally contained 00H, the values returned in the Accumulator and B-register are undefined and the overflow flag are set. The carry flag is cleared in any case. |
| Flags Affected | C AC F0 RS1 RS0 OV P |
| Example | The Accumulator contains 251 (0FBH or 11111011B) and B contains 18 ( 12H or 00010010B). The following instruction, DIV AB leaves 13 in the Accumulator (0DH or 00001101B) and the value 17 (11H or 00010001B) in B, since 251 = (13 x 18) + 17. Carry and OV are both cleared. |
Related topics:
8051 Arithmetic Operation Instructions | 8051 ADD Instruction | 8051 ADDC Instruction | 8051 SUBB Instruction | 8051 INC Instruction | 8051 DEC Instruction | 8051 MUL Instruction | 8051 DA Instruction
List of topics: 8051
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