Hitachi H8S/2338 Series Hardware Manual page 224

Read DTC vector
Read register information
Data transfer
Write register information
CHNE = 1?
Transfer counter = 0
or DISEL = 1?
Clear activation flag
210
Start
Yes
No
Yes
No
End
Figure 6-2 Flowchart of DTC Operation
Next transfer
CHNS = 0?
No
Transfer
counter = 0?
No
DISEL = 1?
No
Clear DTCER
Interrupt exception
handling
Yes
Yes
Yes