upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 150

• Manufacturer Part Number: upd70f3017ay
• Description: V850/sa1tm 32-/16-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

6.5 Oscillation Stabilization Time
the oscillator following release of software STOP mode.
(1) Release non-maskable interrupt or by unmasked interrupt request
(2) Use of RESET pin to secure time (RESET pin input)
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Oscillation wave
The following shows the methods for specifying the length of the oscillation stabilization time required to stabilize
Software STOP mode is released by a non-maskable interrupt or an unmasked interrupt request. When an
interrupt is input to this pin, 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.
The oscillation stabilization time is set by the oscillation stabilization time select register (OSTS).
After the specified amount of time has elapsed, system clock output starts and processing branches to the
interrupt handler address.
Interrupt input
For securing time with the RESET pin, refer to CHAPTER 15 RESET FUNCTION.
The oscillation stabilization time is 2
STOP status
Oscillation stabilization time =
Main clock
Software STOP mode is set
CHAPTER 6 CLOCK GENERATION FUNCTION
Figure 6-2. Oscillation Stabilization Time
Oscillator is stopped
·
·
19
/fxx according to the value of the OSTS register after reset.
WDT count time
User’s Manual U12768EJ4V1UD
Oscillation stabilization
time count