NEC PD754144 - Manual (Page 221)

CHAPTER 8 STANDBY FUNCTION
221 User’s Manual U10676EJ3V0UM
Figure 8-3. STOP Mode Release by Key Return Reset or RESET Input
IE ×××←0
STOP
NOP
Key return reset
or RESET input
The differences between release by a key return reset and release by RESET input are as follows.
RESET Input Key Return Reset
Key return flag (KRF) 0 1
Watchdog flag (WDF) 0 Retained