| ??? 11/14/02 17:09 Read: times |
#32486 - RE: Ultimate Security |
Why dont you implement I2C ,Use 2x PCF8574
for keybd and one for LCD .You need to spare only 2pins of the micro,I have written code for 4x4 matrix keybd used in a80C320 running at 24Mhz.It will be very easy to modify the code for any freq:.If you need the code please let me know. |
| 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 |