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HD6432351 Datasheet(PDF) 344 Page - Renesas Technology Corp

Part # HD6432351
Description  16-Bit Single-Chip Microcomputer
PDF  1025 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6432351 Datasheet(HTML) 344 Page - Renesas Technology Corp

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Section 8 Data Transfer Controller (DTC)
Rev. 3.00 Sep 15, 2006 page 310 of 988
REJ09B0330-0300
8.3.6
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 8.6 lists the register information in repeat mode and figure 8.7 shows memory mapping in
repeat mode.
Table 8.6
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 (8 bits
× 2)
DTC transfer count register B
CRB
Not used
Transfer
SAR or
DAR
DAR or
SAR
Repeat area
Figure 8.7 Memory Mapping in Repeat Mode



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