CHAPTER 6 CLOCK GENERATION FUNCTION
User’s Manual U13850EJ4V0UM
172
6.5 Oscillation Stabilization Time
The following shows methods for specifying the length of oscillation stabilization time required to stabilize the
oscillator following cancellation of STOP mode.
(1) Cancellation by non-maskable interrupt or by unmasked interrupt request
STOP mode is canceled by a non-maskable interrupt or an unmasked interrupt request. When an interrupt is
input, the counter (watchdog timer) starts counting and the count time is the length of time that must elapse for
stabilization of the oscillator’s clock output.
Oscillation stabilization time =
∙
∙
WDT count time
After the specified amount of time has elapsed, system clock output starts and processing branches to the
interrupt handler address.
Figure 6-5. Oscillation Stabilization Time
STOP mode is set
Oscillator is stopped
Interrupt input
Oscillation wave
Main clock
STOP status
Count time value of time
base counter
(2) Use of RESET pin to allocate time (RESET pin input)
For allocating time with RESET pin, refer to
CHAPTER 15 RESET FUNCTION
.
Содержание MPD703030A
Страница 2: ...User s Manual U13850EJ4V0UM 2 MEMO ...
Страница 514: ...User s Manual U13850EJ4V0UM 514 MEMO ...