UPD70F3740GC-UEU-AX Datasheet, PDF (687/889 Pages) Renesas Technology Corp – RENESAS MCU

V850ES/JG3
CHAPTER 20 KEY INTERRUPT FUNCTION
CHAPTER 20 KEY INTERRUPT FUNCTION
20.1 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.
Table 20-1. Assignment of Key Return Detection Pins
Flag
KRM0
KRM1
KRM2
KRM3
KRM4
KRM5
KRM6
KRM7
Pin Description
Controls KR0 signal in 1-bit units
Controls KR1 signal in 1-bit units
Controls KR2 signal in 1-bit units
Controls KR3 signal in 1-bit units
Controls KR4 signal in 1-bit units
Controls KR5 signal in 1-bit units
Controls KR6 signal in 1-bit units
Controls KR7 signal in 1-bit units
Figure 20-1. Key Return Block Diagram
KR7
KR6
KR5
KR4
INTKR
KR3
KR2
KR1
KR0
KRM7 KRM6 KRM5 KRM4 KRM3 KRM2 KRM1 KRM0
Key return mode register (KRM)
R01UH0015EJ0300 Rev.3.00
Sep 30, 2010
Page 671 of 870