Datasheet

RL78/L12 CHAPTER 15 MULTIPLIER AND DIVIDER/MULTIPLY-ACCUMULATOR
R01UH0330EJ0200 Rev.2.00 662
Dec 13, 2013
CHAPTER 15 MULTIPLIER AND DIVIDER/MULTIPLY-ACCUMULATOR
15.1 Functions of Multiplier and Divider/Multiply-Accumulator
The multiplier and divider/multiply-accumulator has the following functions.
• 16 bits × 16 bits = 32 bits (Unsigned)
• 16 bits × 16 bits = 32 bits (Signed)
• 16 bits × 16 bits + 32 bits = 32 bits (Unsigned)
• 16 bits × 16 bits + 32 bits = 32 bits (Signed)
• 32 bits ÷ 32 bits = 32 bits, 32-bits remainder (Unsigned)
15.2 Configuration of Multiplier and Divider/Multiply-Accumulator
The multiplier and divider/multiply-accumulator consists of the following hardware.
Table 15-1. Configuration of Multiplier and Divider/Multiply-Accumulator
Item Configuration
Registers
Multiplication/division data register A (L) (MDAL)
Multiplication/division data register A (H) (MDAH)
Multiplication/division data register B (L) (MDBL)
Multiplication/division data register B (H) (MDBH)
Multiplication/division data register C (L) (MDCL)
Multiplication/division data register C (H) (MDCH)
Control register Multiplication/division control register (MDUC)
Figure 15-1 shows a block diagram of the multiplier and divider/multiply-accumulator.