Flowchart Of Data Transfer Cycle - Hitachi H8/500 Series Hardware Manual

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INT
DTC interrupt?
Y
DTC
Read DTC vector
Read transfer mode
Read source address
Read data
Source address
increment mode?
N
Increment source address (+1 or +2)
Read destination address
Write data
Destination address
increment mode?
N
Read DTCR
→
DTCR DTCR
Write DTCR
DTCR = 0?
N
DTC END
Figure 6-2 Flowchart of Data Transfer Cycle
Interrupt
N
Y
Write source address
Y
Increment destination address
(+1 or +2)
Write destination address
Y
119
CPU
Save PC and SR
Read vector
Read address from
vector table
Start executing
interrupt-handling
routine at that
address.