Renesas rl78 User Manual

RL78/G1A

CHAPTER 14 MULTIPLIER AND DIVIDER/MULTIPLY-ACCUMULATOR

Figure 14-9. Timing Diagram of Multiply-Accumulation (signed) Operation

× 3 + (−4) = 2 → 32767 × (−1) + (−2147483647) = −2147450882 (overflow occurs.))

<1>

<3>

<2>

<5> <6>

<4>

00H

MDCH

0000H

8000H

7FFFH

MDUC

MDSM

<7> <8>

<2>

<5> <6>

<4>

<7> <8>

<10>, <11>

<12>

<9>

48H

0000H

FFFFH

MDCL

8002H

0000H

FFFCH

0002H

0001H

MDAL

0000H

0002H

7FFFH

MDAH

INTMD

0000H

0003H

FFFFH

MDBH

MDBL

MACOF

MACSF

4AH

48H

4AH

Operation clock

4CH

0000H
0000H

0000H
0006H

FFFFH

8001H

<9>

<R>

R01UH0305EJ0200 Rev.2.00

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Jul 04, 2013