CHAPTER 16 STANDBY FUNCTION
User’s Manual U13045EJ2V0UM00
223
(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 16-3. Releasing HALT Mode by RESET Input
Note
In the
µ
PD789104 and 789114 Subseries, 2
15
/f
X
: 6.55 ms (at f
X
= 5.0-MHz operation)
In the
µ
PD789124 and 789134 Subseries, 2
7
/f
CC
: 32
µ
s (at f
CC
= 4.0-MHz operation)
Remark
f
X
: System clock oscillation frequency (ceramic/crystal oscillation)
f
CC
: System clock oscillation frequency (RC oscillation)
Table 16-2. Operation after Release of HALT Mode
Releasing Source
MK
××
IE
Operation
Maskable interrupt request
0
0
Executes next address instruction
0
1
Executes interrupt processing
1
×
Retains HALT mode
Non-maskable interrupt request
—
×
Executes interrupt processing
RESET input
—
—
Reset processing
×
: don’t care
HALT
instruction
RESET
signal
Wait
Note
Reset
period
HALT mode
Operating
mode
Oscillation
stabilization
wait status
Clock
Operating
mode
Oscillation
stop
Oscillation
Oscillation
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