p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 176

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 7 Data Transfer Controller (DTC)
7.5.2
In repeat mode, one activation source transfers one byte or one word of data. Table 7.4 lists the
register functions in repeat mode. From 1 to 256 transfers can be specified. Once the specified
number of transfers has been completed, the initial states of the transfer counter and the address
register that is 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
the DISEL bit in MRB is cleared to 0.
Table 7.4
Rev. 1.00 Sep. 21, 2006 Page 138 of 658
REJ09B0310-0100
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
DAR
or
Repeat Mode
Register Functions in Repeat Mode
Figure 7.6 Memory Mapping in Repeat Mode
Repeat area
Abbreviation
SAR
DAR
CRAH
CRAL
CRB
Transfer
Function
Transfer source address
Transfer destination address
Holds number of transfers
Transfer Count
Not used
DAR
SAR
or