Hitachi H8S/2378, H8S/2378R Series Hardware Manual page 433

Figure 9.4 shows a flowchart of DTC operation, and table 9.2 summarizes the chain transfer
conditions (combinations for performing the second and third transfers are omitted).
Read DTC vector
Read register information
Data transfer
Write register information
CHNE = 1?
Transfer counter = 0
or DISEL = 1?
Clear activation flag
Start
Yes
No
Yes
No
End
Figure 9.4 Flowchart of DTC Operation
Next transfer
CHNS = 0?
No
Transfer
counter = 0?
No
DISEL = 1?
No
Clear DTCER
Interrupt exception
handling
Rev. 1.0, 09/01, page 389 of 904
Yes
Yes
Yes