Renesas RL78 Series User Manual page 646

RL78/G1D
Figure 16-1. Block Diagram of Multiplier and Divider/Multiply-Accumulator
Multiply-
Multiplication result (product) or
accumulation
multiplication result (product) while in
result
multiply-accumulator mode
(accumulated)
Multiplication/division data register B
MDBH MDBL
Divisor
Addition block
Remark f : CPU/peripheral hardware clock frequency
CLK
R01UH0515EJ0120 Rev.1.20
Dec 16, 2016
CHAPTER 16 MULTIPLIER AND DIVIDER/MULTIPLY-ACCUMULATOR
Internal bus
Division
result
(remainder)
Multiplication/division data register C
MDCH MDCL
Multiplier Dividend
Controller Controller
Multiplication/division block
Controller
Division result
(quotient)
Multiplication/division data register A
MDAH MDAL
Multiplicand
Data flow during division
Data flow during multiplication and multiply-accumulation
Multiplication/division
control register (MDUC)
DIVMODE MACMODE MDSM MACOF MACSF DIVST
Start
3 2
Counter
INTMD
Clear
f
CLK
625