AnyDATA.NET Inc.
AnyTime AnyPlace Any Wireless Data Solution
TM
All Rights Reserved.
AD-2001-06-28 Ver 1.1
-21-
4.7 User Interface
4.7.1 Keypad
The keypad interface consists of a 4 X 5 matrix pattern. Only 4 of the 5-KEYSENSE/[4:0] pins are
used to connect a matrix keypad to the module. The KEYSENSE/ pins are active low.
5-GPIO pins are necessary to construct the other side of the matrix. These 5-GPIO pins must be active
high in order for the keypad matrix to work properly. The general keypad matrix is shown below:
#
KEYSENSE0/
KEYSENSE1/
KEYSENSE2/
KEYSENSE3/
1-GPIO
2-GPIO
3-GPIO
4-GPIO
5-GPIO
9
6
3
0
8
5
2
*
7
4
1
SEND
END
Reserved
Figure 4-2 Keypad Matrix
