HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 238

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 7 Data Transfer Controller
7.3.6
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 states of the transfer counter and the address register specified as the repeat area are
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 7.6 lists the register information in repeat mode and figure 7.7 shows memory mapping in
repeat mode.
Table 7.6
Name
DTC source address register
DTC destination address register
DTC transfer count register AH
DTC transfer count register AL
DTC transfer count register B
Rev.3.00 Mar. 26, 2007 Page 196 of 772
REJ09B0355-0300
SAR or
DAR
Repeat Mode
Register Information in Repeat Mode
Figure 7.7 Memory Mapping in Repeat Mode
SAR
Abbreviation
DAR
CRAH
CRAL
CRB
Transfer
Function
Designates source address
Designates destination address
Holds number of transfers
Designates transfer count
Not used
DAR or
SAR