Fig. 2.1.2 Key Scan Input Timing - Renesas 4513 User Manual

APPLICATION
2.1 I/O pins
"H"
D
0
"L"
"H"
D
1
"L"
"H"
D
2
"L"
"H"
D
3
"L"
Note: "H" output of port D becomes high-impedance state.

Fig. 2.1.2 Key scan input timing

2-8
IAP0 IAP0
Input to Input to
SW1–SW4 SW5–SW8
4513/4514 Group User's Manual
Switching key input selection port (D
Stabilizing wait time for input
Reading port (key input)
Key input period
IAP0
Input to Input to
SW9–SW12 SW13–SW16
D )
0
IAP0 IAP0
Input to
SW1–SW4
1