| ??? 02/27/05 17:01 Read: times Msg Score: 0 -1 Non-Specific question -1 Didn't Search First +2 Underrated |
#88578 - Connecting LCD and Keypad to 8051 |
Hello everybody !
I intend to connect the lcd panel direct to the 8051 port without using address decoder, my approach is as follows: LCD CONNECTION P1.0 ;DB0 --- ;--- --- ;--- p1.7 ;DB7 P3.5 ;RW P3.6 ;RS P3.7 ;EN KEYPAD CONNCETIONS Matrix Encoded Keypad (74C922 16-key encoder) The keypad is connected to the encoder the output connections of encoder are DOUT A DOUT B DOUT C DOUT D DA TO 7404N(INVERTER) Is it Ok to connect the out puts of key encoder A,B,C,D to 8051 Port P0 pins P0.0,P0.1,P0.2,P0.3. and DA to P3.3 IS IT OK? If not, what should be the correct procedure. Regards Yogesh |
| Topic | Author | Date |
| Connecting LCD and Keypad to 8051 | 01/01/70 00:00 | |
| No problem | 01/01/70 00:00 | |
| Beats me. | 01/01/70 00:00 | |
| 74C992 | 01/01/70 00:00 | |
| Will the real encoder please stand up... | 01/01/70 00:00 | |
| Part Cost | 01/01/70 00:00 | |
| Or One Part..... | 01/01/70 00:00 | |
| Connecting LCD & Keyboard | 01/01/70 00:00 | |
| connecting a keypad | 01/01/70 00:00 | |
selling antiques as new | 01/01/70 00:00 |