Register - NEC V850ES/KE1+ User Manual

18.2 Register

(1) Key return mode register (KRM)
The KRM register controls the KRM0 to KRM7 bits using the KR0 to KR7 signals.
This register can be read or written in 8-bit or 1-bit units.
Reset sets this register to 00H.
After reset: 00H
KRM KRM7
KRMn
Caution If the KRM register is changed, an interrupt request signal (INTKR) may be
Remark
CHAPTER 18 KEY INTERRUPT FUNCTION
R/W Address: FFFFF300H
KRM6 KRM5 KRM4
0
Does not detect key return signal
1
Detects key return signal
generated. To prevent this, change the KRM register after disabling interrupts
(DI), and then enable interrupts (EI) after clearing the interrupt request flag
(KRIC.KRIF bit) to 0.
For the alternate-function pin settings, refer to Table 4-12 Settings When Port Pins
Are Used for Alternate Functions.
User's Manual U16896EJ2V0UD
KRM3 KRM2 KRM1
Key return mode control
KRM0
571