XC68HC705JJ7 Motorola, XC68HC705JJ7 Datasheet - Page 50

• Manufacturer Part Number: XC68HC705JJ7
• Description: MICROCONTROLLER
• Manufacturer: Motorola

Central Processor Unit (CPU)
3.8 Arithmetic/Logic Unit (ALU)
Advance Information
50
The ALU performs the arithmetic and logical operations defined by the
instruction set. The binary arithmetic circuits decode instructions and set
up the ALU for the selected operation. Most binary arithmetic is based
on the addition algorithm, carrying out subtraction as negative addition.
Multiplication is not performed as a discrete operation but as a chain of
addition and shift operations within the ALU. The multiply instruction
(MUL) requires 11 internal clock cycles to complete this chain of
operations.
Central Processor Unit (CPU)
MC68HC705JJ7 • MC68HC705JP7 — REV 4
MOTOROLA