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520
CHAPTER 25 STAND-BY FUNCTION
Table 25-3. HALT Mode Release and Operate After Release
MK
Note 1
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0
0
1
0
1
IE
Note 2
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1
0
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Release Source
RESET input
NMI pin input
Maskable
interrupt
request (except
for a macro
service request)
Macro service
request
State During Release
–
None while executing a nonmaskable
interrupt service program
Executing a low-priority nonmaskable
interrupt service program
Executing the service program for
the NMI pin input
Executing a high-priority nonmaskable
interrupt service program
None while executing an interrupt
service program
Executing a low-priority maskable
interrupt service program
The PRSL bit
Note 4
is cleared to
zero while executing an interrupt
service program at priority level 3.
Executing a maskable interrupt
service program with the same
priority
(This excludes executing an interrupt
service program in priority level 3
when the PRSL bit
Note 4
is cleared
to zero.)
Executing a high-priority interrupt
service program
–
–
–
–
Operation After Release
Normal reset operation
Accepts interrupt requests
The instruction following the MOV
STBC, #byte instruction is executed.
(The interrupt request that released
the HALT mode is saved
Note 3
.)
Accepts interrupt requests
The instruction following MOV STBC,
#byte is executed.
(The interrupt request that released
the HALT mode is saved
Note 3
.)
Holds the HALT mode
Macro service process execution
End condition is not satisfied
End
HOLD mode condition is satisfied
again
When VCIE
Note 5
= 1:
HALT mode again
When VCIE
Note 5
= 0:
Same as a release by the
maskable interrupt request
Holds the HALT mode
Notes 1.
Interrupt mask bit in each interrupt request source
2.
Interrupt enable flag in the program status word (PSW)
3.
The held interrupt request is accepted when acceptance is enabled.
4.
Bit in the interrupt mode control register (IMC)
5.
Bit in the macro service mode register of the macro service control word that is in each macro service
request source