| ??? 11/09/02 00:43 Read: times |
#32196 - RE: keypad matrix // Michael |
Keypad matrix is great for saving port pins, but if you need to press more than 1 key simultaneously, key matrix is no good and it is a must that you use a port pin for each switch.
Another way to reduce pin count is to multiplex pins as inputs and outputs at the same time. Regards Mahmood |
| Topic | Author | Date |
| ST New uPD3200 | 01/01/70 00:00 | |
| RE: ST New uPD3200 | 01/01/70 00:00 | |
| RE: ST New uPD3200 | 01/01/70 00:00 | |
| RE: ST New uPD3200 | 01/01/70 00:00 | |
| RE: keypad matrix // Michael | 01/01/70 00:00 | |
| RE: lcd/keyboard | 01/01/70 00:00 | |
| RE: keypad matrix // Michael | 01/01/70 00:00 | |
| RE: keypad matrix // Michael | 01/01/70 00:00 | |
| RE: keypad matrix // Michael | 01/01/70 00:00 | |
| RE: keypad matrix // Michael | 01/01/70 00:00 | |
| RE: keypad matrix // Rauf, | 01/01/70 00:00 | |
| RE: security | 01/01/70 00:00 | |
| RE: keypad matrix - one pin needed | 01/01/70 00:00 | |
| RE: security | 01/01/70 00:00 | |
| RE: Ultimate Security | 01/01/70 00:00 | |
RE: Ultimate Security | 01/01/70 00:00 |