CHAPTER 15 STANDBY FUNCTION
User’s Manual U15075EJ1V0UM00
283
(c)
Releasing by RESET input
When the HALT mode is released by the RESET signal, execution branches to the reset vector
address in the same manner as the ordinary reset operation, and program execution is started.
Figure 15-3. Releasing HALT Mode by RESET Input
HALT
instruction
RESET
signal
Wait
(2
15
/f
X
: 6.55 ms)
Reset
period
HALT mode
Operation
mode
Oscillation
stabilization
wait status
Clock
Operation
mode
Oscillation
stops
Oscillation
Oscillation
Remark
f
X
: Main system clock oscillation frequency
Table 15-2. Operation After Releasing HALT Mode
Releasing Source
MKxx
IE
Operation
0
0
Executes next address instruction
0
1
Executes interrupt servicing
Maskable interrupt request
1
x
Retains HALT mode
Non-maskable interrupt request
−
x
Executes interrupt servicing
RESET input
-
−
-
−
Reset processing
x: don’t care
Содержание mPD789426 Series
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