349
CHAPTER 16 INTERRUPT AND TEST FUNCTIONS
User’s Manual U11302EJ4V0UM
Figure 16-11. Non-Maskable Interrupt Request Acknowledgment Operation
(a)
If a new non-maskable interrupt request is generated during
non-maskable interrupt servicing program execution
(b)
If two non-maskable interrupt requests are generated during
non-maskable interrupt servicing program execution
Main routine
NMI request
<1>
Execution of 1 instruction
NMI request
<2>
Execution of NMI request
<1>
NMI request
<2>
held pending
Servicing of pending NMI request
<2>
Main routine
NMI request
<1>
Execution of 1 instruction
Execution of NMI request
<1>
NMI request
<2>
held pending
NMI request
<3>
held pending
Servicing of pending NMI request
<2>
NMI request
<3>
not acknowledged
(Although two or more NMI requests have been generated,
only one request is acknowledged.)
NMI request
<2>
NMI request
<3>
Содержание mPD780208 Subseries
Страница 2: ...2 User s Manual U11302EJ4V0UM MEMO...