h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 231
h8s-2138
Manufacturer Part Number
h8s-2138
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2138.pdf
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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 address register state specified by the transfer counter and repeat area resumes and transfer
is repeated. In repeat mode the transfer counter 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
SAR or
DAR
Repeat Mode
Register Information in Repeat Mode
Repeat area
Figure 7.7 Memory Mapping in Repeat Mode
Abbreviation
SAR
DAR
CRAH
CRAL
CRB
Transfer
Section 7 Data Transfer Controller [H8S/2138 Group]
Rev. 4.00 Jun 06, 2006 page 177 of 1004
Function
Transfer source address
Transfer destination address
Holds number of transfers
Transfer count
Not used
REJ09B0301-0400
DAR or
SAR
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