h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 206

• Manufacturer Part Number: h8s-2169
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 7 Data Transfer Controller
7.3
7.3.1
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 7.2 shows a flowchart of DTC operation.
Rev. 3.00 Jan 18, 2006 page 178 of 1044
REJ09B0280-0300
Operation
Overview
Read register information
Write register information
Clear activation flag
Transfer counter = 0
Read DTC vector
or DISEL = 1?
Data transfer
CHNE = 1?
No
No
Figure 7.2 Flowchart of DTC Operation
Start
End
Yes
Yes
Next transfer
Interrupt exception
Clear DTCER
handling