CHAPTER 15 STANDBY FUNCTION
User’s Manual U15075EJ2V1UD
285
(2) Releasing HALT mode
The HALT mode can be released by the following three types of sources:
(a) Releasing by unmasked interrupt request
The HALT mode is released by an unmasked interrupt request. In this case, if the interrupt is enabled
to be acknowledged, vectored interrupt processing is performed. If the interrupt is disabled, the
instruction at the next address is executed.
Figure 15-2. Releasing HALT Mode by Interrupt
HALT
instruction
Standby
release signal
Wait
Wait
HALT mode
Operation
mode
Operation mode
Clock
Oscillation
Remarks 1.
The broken line indicates the case where the interrupt request that has released the standby mode
is acknowledged.
2.
The wait time is as follows:
•
When vectored interrupt processing is performed:
9 to 10 clocks
•
When vectored interrupt processing is not performed:
1 to 2 clocks
(b) Releasing by non-maskable interrupt request
The HALT mode is released regardless of whether the interrupt is enabled or disabled, and vectored
interrupt processing is performed.
Содержание U789436 Series
Страница 2: ...2 User s Manual U15075EJ2V1UD MEMO ...
Страница 7: ...User s Manual U15075EJ2V1UD 7 MEMO ...