Chapter 18 Key Interrupt Function; Function - NEC V850ES/KE1+ User Manual

18.1 Function

A key interrupt request signal (INTKR) can be generated by inputting a falling edge to the eight key input pins (KR0
to KR7) by setting the KRM register.
Caution If any of the KR0 to KR7 pins is at low level, the INTKR signal is not generated even if a falling
edge is input to another pin.
KR7
KR6
KR5
KR4
KR3
KR2
KR1
KR0
KRM7 KRM6 KRM5 KRM4 KRM3 KRM2 KRM1 KRM0
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CHAPTER 18 KEY INTERRUPT FUNCTION

Table 18-1. Assignment of Key Return Detection Pins
Flag
KRM0 Controls KR0 signal in 1-bit units
KRM1 Controls KR1 signal in 1-bit units
KRM2 Controls KR2 signal in 1-bit units
KRM3 Controls KR3 signal in 1-bit units
KRM4 Controls KR4 signal in 1-bit units
KRM5 Controls KR5 signal in 1-bit units
KRM6 Controls KR6 signal in 1-bit units
KRM7 Controls KR7 signal in 1-bit units
Figure 18-1. Key Return Block Diagram
Key return mode register (KRM)
User's Manual U16896EJ2V0UD
Pin Description
INTKR