HD6432670 Hitachi, HD6432670 Datasheet - Page 382

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Block Transfer Mode:
Bit
31
to
24
23
to
16
15
to
0
Rev. 2.0, 04/02, page 336 of 906
Bit Name
—
Initial Value
All 0
Undefined
Undefined
R/W
—
R/W
R/W
Description
Reserved
These bits are always read as 0 and cannot be
modified.
Block Size
These bits specify the block size (number of
bytes or number of words) for block transfer.
Setting H'01 specifies one as the block, while
setting H'00 specifies the maximum block size,
that is 256. The register value always indicates
the specified block size.
16-Bit Transfer Counter
These bits specify the number of block
transfers. Setting H'0001 specifies one block
transfer. Setting H'0000 means no specification
for the number of transfers, and the transfer
counter function is halted. In this case, there is
no transfer end interrupt by the transfer counter.
Setting H'FFFF specifies the maximum number
of block transfers, that is 65,535. During
EXDMA transfer, this counter shows the
remaining number of block transfers.