205
Chapter 8
Interrupt/Exception Processing Function
Preliminary User’s Manual U15839EE1V0UM00
Figure 8-1:
Example of Non-Maskable Interrupt Request Acknowledgement Operation (2/2)
(b) NMI request generated during NMI servicing
Main routine
NMI0 request
NMIWDT request
NMI0 servicing
(Held pending)
System reset
NMI request generated during NMI servicing
NMI being
serviced
NMI0
NMIWDT
NMI0
NMI0 request generated during
NMI0 servicing
NMIWDT request generated
during NMI0 servicing
(NP = 1 retained before NMI1
request)
NMIWDT request generated
during NMI0 servicing (NP=0
set before NMIWDT request)
NMIWDT
NMI0 request generated during
NMIWDT servicing
NMI1 request generated
during NMIWDT servicing
Main routine
NMI0 request
NMI0 request
NMI0 servicing
(Held pending)
Servicing of
pending NMI0
Main routine
NMI0 request
(Invalid)
System reset
Main routine
(Invalid)
System reset
Main routine
NMI0
request
NMI0 servicing
System reset
NP = 0
Main routine
NMI0
request
NMI0 servicing
System reset
NP = 0
(Held
pending)
NMIWDT servicing
NMIWDT
request
NMIWDT
servicing
NMIWDT request generated
during NMI0 servicing (NP=0
set after NMIWDT request)
NMIWDT
servicing
NMIWDT
request
NMIWDT
request
NMIWDT
request
NMIWDT request
NMIWDT
servicing
NMIWDT
servicing
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