CHAPTER 17 INTERRUPT/EXCEPTION PROCESSING FUNCTION
User’s Manual U16896EJ2V0UD
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Figure 17-4. Maskable Interrupt Servicing
Maskable interrupt request
Interrupt servicing
EIPC
EIPSW
ECR. EICC
PSW. EP
PSW. ID
ISPR.
corresponding-
bit
Note
PC
INTC acknowledged
CPU processing
Interrupt mask
released?
Priority higher than
that of interrupt currently
being serviced?
Interrupt request pending
PSW. NP
PSW. ID
Interrupt request pending
No
No
No
No
1
0
1
0
INT input
Yes
Yes
Yes
Yes
Priority higher than
that of other interrupt
requests?
Highest default
priority of interrupt requests with
the same priority?
Restored PC
PSW
Exception code
0
1
1
Handler address
Note
For the ISPR register, refer to
17.3.6 In-service priority register (ISPR)
.