CHAPTER 18 KEY INTERRUPT FUNCTION
User’s Manual U16896EJ2V0UD
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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.
KRM7
Does not detect key return signal
Detects key return signal
KRMn
0
1
Key return mode control
KRM
KRM6
KRM5
KRM4
KRM3
KRM2
KRM1
KRM0
After reset: 00H R/W Address: FFFFF300H
Caution If the KRM register is changed, an interrupt request signal (INTKR) may be
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.
Remark
For the alternate-function pin settings, refer to
Table 4-12 Settings When Port Pins
Are Used for Alternate Functions
.
