Isuru Senarath
Member level 2
HI all
I connected my keypad to AT89S52 as shown in below figure, but I did not get required output.
Out put at LCD will be something like this
If I press this sequence> I will get this
Keypad > LCD
1, 2, 3, A > 1, 2, 3, A
4, 5, 6, B > 1, 2, 3, A
7, 8, 9, C > 1, 2, 3, A
*, 0, #, D > 1, 2, 3, A
What is wrong with my connection?![keypad 1.JPG keypad 1.JPG](https://www.edaboard.com/data/attachments/20/20232-9be45f275afa11691000ed21e33ca83b.jpg)
I connected my keypad to AT89S52 as shown in below figure, but I did not get required output.
Out put at LCD will be something like this
If I press this sequence> I will get this
Keypad > LCD
1, 2, 3, A > 1, 2, 3, A
4, 5, 6, B > 1, 2, 3, A
7, 8, 9, C > 1, 2, 3, A
*, 0, #, D > 1, 2, 3, A
What is wrong with my connection?
![keypad 1.JPG keypad 1.JPG](https://www.edaboard.com/data/attachments/20/20232-9be45f275afa11691000ed21e33ca83b.jpg)