SAB80515 Datasheet, PDF (157/270 Pages) Siemens Semiconductor Group – 8-Bit Single-Chip Microcontroller Family

Instruction Set
DIV
AB
Function:
Divide
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 will be
cleared.
Exception: If B had originally contained 00H, the values returned in the accumulator
and B register will be undefined and the overflow flag will be set. The carry flag is
cleared in any case.
Example:
The accumulator contains 251 (0FBH or 11111011B) and B contains 18 (12H or
00010010B). The instruction
DIV
AB
will leave 13 in the accumulator (0DH or 00001101 B) and the value 17 (11H or
00010001B) in B, since 251 = (13x18) + 17. Carry and OV will both be cleared.
Operation: DIV
(A15-8)
(B7-0) ^{← (A) / (B)}
Encoding:
Bytes:
Cycles:
1000 0100
1
4
Semiconductor Group
157