Repeat Mode; Figure 7.6 Memory Mapping In Repeat Mode; Table 7.4 Register Functions In Repeat Mode - Renesas H8S/2158 User Manual

Section 7 Data Transfer Controller (DTC)
7.5.2

Repeat Mode

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 have 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 Register Functions in Repeat Mode
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
Rev. 3.00 Jan 25, 2006 page 158 of 872
REJ09B0286-0300
Abbreviation
SAR
DAR
CRAH
CRAL
CRB
Repeat area
Transfer

Figure 7.6 Memory Mapping in Repeat Mode

Function
Transfer source address
Transfer destination address
Holds number of transfers
Transfer counter
Not used
DAR
or
SAR