h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 218

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 8 Data Transfer Controller (DTC)
8.3
8.3.1
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 8.2 shows a flowchart of DTC operation.
Rev. 5.00 Sep 22, 2005 page 192 of 1136
REJ09B0257-0500
Operation
Overview
Read register information
Write register information
Clear an activation flag
Transfer Counter = 0
Read DTC vector
Data transfer
or DISEL = 1
Figure 8.2 Flowchart of DTC Operation
No
No
CHNE = 1
Start
End
Yes
Yes
Next transfer
Interrupt exception
Clear DTCER
handling