Z8018x
Family MPU User Manual
281
UM005004-0918
Operating Modes Summary
REQUEST ACCEPTANCES IN EACH OPERATING MODE
Table 53. Request Acceptances in Each Operating Mode
Current
Status
Request
Normal
Operation
(CPU mode
and IOSTOP
Mode)
WAIT State
Refresh
Cycle
Interrupt
Acknowledge
Cycle
DMA Cycle
BUS
RELEASE
Mode
SLEEP
Mode
SYSTEM
STOP
Mode
WAIT
Acceptable
Acceptable
Not
acceptable
Acceptable
Acceptable
Not
acceptable
Not
acceptable
Not
acceptable
Refresh Request
Request of Refresh
by the on-chip
Refresh Controller
Refresh cycle
begins at the
end of Machine
Cycle (MC)
Not
acceptable
Not
acceptable
Refresh cycle
begins at the
end MC
Refresh cycle
begins at the
end of MC
Not
acceptable
Not
acceptable
Not
acceptable
DREQ0
DREQ1
DMA cycle
begins at the
end of MC
DMA cycle
begins at the
end of MC
Acceptable
Refresh cycle
precedes.
DMA cycle
begins at the
end of one
MC
Acceptable
DMA cycle
begins at the
end of MC.
Acceptable
Refer to
“DMA
Controller”
for details.
Acceptable
*After BUS
RELEASE
cycle, DMA
cycle begins
at the end of
one MC
Not
acceptable
Not
acceptable
BUSREQ
Bus is released
at the end of
MC
Not
acceptable
Not
acceptable
Bus is released
at the end of
MC
Bus is
released at the
end of MC
Continue
BUS
RELEASE
mode
Acceptable
Acceptable
Interrupt INT0,
INT1,
1NT2
Accepted after
executing the
current
instruction.
Accepted
after
executing the
current
instruction
Not
acceptable
Not
acceptable
Not
acceptable
Not
acceptable
Acceptable
Return from
SLEEP
mode to
normal
operation.
Acceptable
Return from
SYSTEM
STOP mode
to normal
operation
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