| ??? 12/22/06 06:31 Read: times |
#129967 - at 89S52 chip acting unreliably |
hi i am using an atmel 89S52 chip to drive a 16x2 LCD and 4 relays the program works fine but sometimes when i start i face these problems
1. LCD display gets garbled 2. The entire display and isr routine to count time goes super fast ....... i.e. a 1 minute routine gets over in 10 seconds or so (i am using timer isr) the first problem got far better by shortening the length of the display cables ....... so the query is what is the optimum length of the display cables ........... |
| Topic | Author | Date |
| at 89S52 chip acting unreliably | 01/01/70 00:00 | |
| LCD reset | 01/01/70 00:00 | |
| Processor Reset | 01/01/70 00:00 | |
| at 89S52 chip acting unreliably | 01/01/70 00:00 | |
| no oscilloscope, use LED | 01/01/70 00:00 | |
| Proper Reset - not RC! | 01/01/70 00:00 | |
| make reset "hybrid" chip with opamp | 01/01/70 00:00 | |
| that is plain crazy | 01/01/70 00:00 | |
| allmost crazy | 01/01/70 00:00 | |
| Why take the risk? | 01/01/70 00:00 | |
| use a proper supervisor chip | 01/01/70 00:00 | |
| Thank you | 01/01/70 00:00 | |
| What a supervisor does | 01/01/70 00:00 | |
| Keyboard problem? | 01/01/70 00:00 | |
| Re. Keyboard problem? | 01/01/70 00:00 | |
| RC | 01/01/70 00:00 | |
evrything you wanted to ask about RC reset... | 01/01/70 00:00 |