Data Types - Fujitsu FR60 Hardware Manual

14.3.5 Data Types

Select the data length (data width) transferred in one transfer operation from the
followings:
• Byte
• Halfword
• Word
■ Data Length (Data Width)
Since the word boundary specification is also observed in DMA transfer, different low-order bits
are ignored if an address with a different data length is specified for the transfer destination/
transfer source address.
• Byte:
• Halfword: The actual access address has 2-byte length starting with "0" as the lowest-order
• Word:
If the lowest-order bits in the transfer source address and transfer destination address are
different, the addresses as set are output on the internal address bus. However, each transfer
target on the bus is accessed after the addresses are corrected according to the above rules.
The actual access address and the addressing match.
bit.
The actual access address has a 4-byte length starting with "00" as the lowest-
order 2 bits.
CHAPTER 14 DMA CONTROLLER (DMAC)
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