Securing Setup Time When Releasing Idle2 Mode - NEC V850E/RS1 User Manual

18.5.3 Securing setup time when releasing IDLE2 mode

Secure the setup time for the ROM (flash memory) after releasing the IDLE2 mode because the
operation of the blocks other than the main clock oscillator stops after IDLE2 mode is set.
(1) Releasing IDLE2 mode by non-maskable interrupt request or unmasked maskable interrupt
request
Secure the specified setup time by setting the OSTS register.
When the releasing source is generated, the dedicated internal timer starts counting according to
the OSTS register setting. When it overflows, the normal operation mode is restored.
Oscillated waveform
IDLE mode status
Interrupt request
(2) Release by reset input (RESET pin input, WDT2RES occurrence)
This operation is the same as that of a normal reset.
The oscillation stabilization time is the initial value of the OSTS register, 2
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Chapter 18 Standby Function
Figure 18-5: IDLE Mode Timing
Main clock
ROM circuit stopped
User's Manual U16702EE3V2UD00
Setup time count
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