MC80F0304/08/16
November 4, 2011 Ver 2.12
105
Figure 19-4 STOP Releasing Flow by Interrupts
.
Figure 19-5 STOP Mode Release Timing by External Interrupt
IENH or IENL ?
=0
=1
STOP
INSTRUCTION
STOP Mode
Interrupt Request
STOP Mode Release
I-FLAG
=1
Interrupt Service Routine
Next
INSTRUCTION
=0
Master Interrupt
Enable Bit PSW[2]
Corresponding Interrupt
Enable Bit (IENH, IENL)
Before executing Stop instruction, Basic Interval Timer must be set
Oscillator
(X
IN
pin)
~~
n
0
BIT Counter
n+1 n+2
n+3
~~
Normal Operation
Stop Operation
Normal Operation
1
FE
FF
0
1
2
~~
~~
~~
t
ST
>
20ms
~~
~~
External Interrupt
Internal Clock
Clear
STOP Instruction
Executed
~~
~~
~~
properly by software to get stabilization time which is longer than 20ms.
by software
~~
Stabilization Time