Fujitsu FR60 Hardware Manual page 517

Table 16.3-3 lists the specifiable transfer addresses for demand transfer 2-cycle transfer.
Table 16.3-3 Specifiable Transfer Addresses for Demand Transfer 2-Cycle Transfer
Transfer source address
For a demand transfer, be sure to set an external area address for the transfer source or transfer destination
or both. Since DMA transfer is adjusted to the external bus timing in demand transfer mode, access to
external areas is always needed.
Since the SDRAM area is not supported as a transfer source/transfer destination during demand transfer,
this area cannot be set.
■ Demand Transfer Fly-by Transfer
A demand transfer fly-by transfer has the same features as a 2-cycle transfer except that the transfer area
can only be external areas, and the transfer unit is read (memory → I/O) or write (I/O → memory) only.
Table 16.3-4 lists the specifiable transfer addresses for demand transfer fly-by transfer.
Table 16.3-4 Specifiable Transfer Addresses for Demand Transfer Fly-by Transfer
Transfer source addressing
Specification not required (invalid)
■ Step/Block Transfer 2-Cycle Transfer
For a step/block transfer (Transfer for each transfer request is performed as many times as the specified
block count), all 32-bit areas can be specified as the transfer source/transfer destination address.
Table 16.3-5 lists the specifiable transfer addresses for step/block transfer 2-cycle transfer.
Table 16.3-5 Specifiable Transfer Addresses for Step/Block Transfer 2-Cycle Transfer
Transfer source addressing
External area
External area
External area
Built-in I/O
Built-in RAM
All 32-bit areas specifiable
Direction Transfer destination address
→
→
→
→
→
Direction
None
Direction
→
External area
Built-in I/O
Built-in RAM
External area
External area
Transfer destination addressing
External area
Transfer destination addressing
All 32-bit areas specifiable
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