Repeat Mode; Figure 8.6 Memory Mapping In Repeat Mode; Table 8.3 Register Information In Repeat Mode - Hitachi H8S/2628 Hardware Manual

H8s/2628 series 16-bit single-chip microcomputer
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8.5.2

Repeat Mode

In repeat mode, one operation transfers one byte or one word of data. Table 8.3 lists the register
information in repeat mode.
From 1 to 256 transfers can be specified. Once the specified number of transfers have ended, the
initial state of the transfer counter and the address register specified as the repeat area is restored,
and transfer is repeated. In repeat mode the transfer counter value does not reach H'00, and
therefore CPU interrupts cannot be requested when DISEL = 0.
Table 8.3
Register Information in Repeat Mode
Name
DTC source address register
DTC destination address register
DTC transfer count register AH
DTC transfer count register AL
DTC transfer count register B
SAR
or
DAR
Rev. 1.0, 09/02, page 110 of 568
Abbreviation
SAR
DAR
CRAH
CRAL
CRB
Repeat area

Figure 8.6 Memory Mapping in Repeat Mode

Function
Designates source address
Designates destination address
Holds number of transfers
Designates transfer count
Not used
Transfer
DAR
or
SAR

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