HD6435348R Hitachi Semiconductor, HD6435348R Datasheet - Page 126

• Manufacturer Part Number: HD6435348R
• Description: Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

Address
error?
Y
Address
error?
N
Trace?
Y
Exception-handling
Y
N
sequence
N
Figure 5-2 Interrupt Handling Flowchart
N
Clear T bit
Trace
NMI?
Y
Program execution state
Interrupt requested?
N
Update mask level
Level-7 interrupt?
To user-coded
exception-handling
routine
Data transfer
Mask level
in SR
Maximum
Vectoring
enabled?
Save PC
Save SR
mode?
N
Y
Y
Y
N
6?
107
Save PC
Y
N
N
Level-6 interrupt?
N
Y
Mask level
in SR
Interrupt remains pending
Y
Read destination address
Y
Y
Read source address
5?
Read transfer mode
address increment
address increment
DTCR-1
Read DTC vector
Read DTCR
Write DTCR
DTCR = 0?
Destination
Read data
Write data
Source
mode?
mode?
N
N
N
N
DTCR
Level-1 interrupt?
Start DTC
Mask level
in SR = 0?
Write source address
address (+1 or +2)
address (+1 or +2)
Increment source
Increment source
Write destination
Y
Y
Y
address
Y
N
N
N