UPD78F1154GK-GAK-AX NEC, UPD78F1154GK-GAK-AX Datasheet - Page 56

• Manufacturer Part Number: UPD78F1154GK-GAK-AX
• Description: 16BIT MCU, 128K FLASH, 8K RAM, SMD
• Manufacturer: NEC

Specifications of UPD78F1154GK-GAK-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 70
• Ram Memory Size: 8192Byte
• Cpu Speed: 20MHz
• No. Of Timers: 9
• No. Of: RoHS Compliant
• Core Size: 16bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

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7.11 Multiplier
The multiplier executes an operation of 16 bits × 16 bits with one clock.
It has the following features.
• Can execute calculation of 16 bits × 16 bits = 32 bits.
The multiplier uses the following four registers.
(1) 16-bit higher multiplication result storage register and 16-bit lower multiplication result storage register
(2) Multiplication input data registers A and B (MULA and MULB)
(MULOH and MULOL)
These two registers, MULOH and MULOL, are used to store a 32-bit multiplication result. The higher 16 bits of
the multiplication result are stored in MULOH and the lower 16 bits, in MULOL, so that a total of 32 bits of the
multiplication result can be stored.
These are 16-bit registers that store data for multiplication. The multiplier multiplies the values of MULA and
MULB.
result storage register (MULOH)
16-bit higher multiplication
Multiplication input data
register A (MULA)
Figure 7-11. Block Diagram of Multiplier
Preliminary Product Information U17892EJ2V0PM
32-bit multiplier
Internal bus
Internal bus
16-bit lower multiplication result
storage register (MULOL)
Multiplication input data
register B (MULB)
78K0R/KF3