Datasheet

Section 9 Data Transfer Controller (DTC)
(This function is not available in the H8S/2695)
R01UH0166EJ0600 Rev. 6.00 Page 349 of 1434
Mar 02, 2011
H8S/2633 Group, H8S/2633 F-ZTAT
TM
,
H8S/2633R F-ZTAT
TM
, H8S/2695
9.3 Operation
9.3.1 Overview
When activated, the DTC reads register information that is already stored in memory and transfers
data on the basis of that register information. After the data transfer, it writes updated register
information back to memory. Pre-storage of register information in memory makes it possible to
transfer data over any required number of channels. Setting the CHNE bit to 1 makes it possible to
perform a number of transfers with a single activation.
Figure 9.2 shows a flowchart of DTC operation.
Start
Read DTC vector
Next transfer
Read register information
Data transfer
Write register information
Clear an activation flag
CHNE=1
End
No
No
Yes
Yes
Transfer Counter= 0
or DISEL= 1
Clear DTCER
Interrupt exception
handling
Figure 9.2 Flowchart of DTC Operation