User`s manual

User’s Manual 67
D.2 Keypad and LCD Connections
Figure D-2. Sample Keypad Connections
Sample Program: KEYLCD.C in SAMPLES/RCM2300.
Figure D-3. Sample LCD Connections
Sample Program: KEYLCD.C in SAMPLES/RCM2300. (When Parallel Port A is not being
used for quick communication, its resting, quiescent value is used to set the LCD contrast
level.)
PB2
PB0
PB3
PB4
PB5
PC1
VCC
10 kW
resistors
RCM2300
Prototyping Board
Keypad
J8
J7
11
12
13
10
14
4
10
11
PD3
PD4
Row 0
Row 2
Row 3
Row 4
Row 5
Row 1
Col 0
Col 1
NC
NC
7
8
9
10
PA2
PA1
PA3
PA4
PA5
PA6
PA7
VLC
20 kW
10 kW
4.7 kW
2.2 kW
1 kW
470 W
680 W
100 nF
3
6
4
5
11
12
13
14
2
2x20 LCD
/CS
C/D
/WR
D4
D5
D6
D7
D0
D1
D2
D3
VLC
VCC
RCM2300
Prototyping Board
J8
2
3
4
5
6
7
8