Datasheet

Table Of Contents
Section 8 Data Transfer Controller (DTC)
REJ09B0140-0900 Rev. 9.00 Page 219 of 846
Sep 16, 2010
H8S/2215 Group
8.5.2 Repeat Mode
In repeat mode, one operation transfers one byte or one word of data. 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 8.5 shows the register information in repeat mode, and figure 8.7 shows the memory
mapping in repeat mode.
Table 8.5 Register Information in Repeat Mode
Name Abbreviation Function
DTC source address register SAR Designates source address
DTC destination address
register
DAR Designates destination address
DTC transfer count register AH CRAH Holds number of transfers
DTC transfer count register AL CRAL Designates transfer count
DTC transfer count register B CRB Not used
SAR
or
DAR
DAR
or
SAR
Repeat area
Transfer
Figure 8.7 Memory Mapping in Repeat Mode