| ??? 04/04/01 04:09 Read: times |
#10537 - Really unusual!!!!! |
Hi! everyone
I'm trying to start with AT89C52 but I can't get it to work all I get is P1 all on 5 volts, all pins from P2 and P0 are showing a square wave with diferent frequecies my osscilator is running I can see it on the ALE and PSEN the EA is to vcc I have .1uf solid tamatalum capacitors bet. vcc and gnd also a 10 uf capacitor at my 5 volts regulator all I have is this and 10K pull-ups, my small test program is running ok on my debug. The reset is done with 10k and 10uf diode and a push-b. I tried diferent crystal but nothing change (6.144, 12, 24, 16 Mhz) I'm using 20pf capacitors ceramic. My software only ini. stack, and writes 0FFH to all 3 ports and after a delay I try to write 01010101B but.... Also my programmer says the micro is good it programmed and verifies good, if anyone knows what could be wrong here please help me!!!!! |
| Topic | Author | Date |
| Really unusual!!!!! | 01/01/70 00:00 | |
| RE: Really unusual!!!!! | 01/01/70 00:00 | |
| RE: Really unusual!!!!! | 01/01/70 00:00 | |
| RE: MY TEST PROGRAM... | 01/01/70 00:00 | |
| RE: Really unusual!!!!! | 01/01/70 00:00 | |
| RE: Really unusual!!!!! | 01/01/70 00:00 | |
| RE: Really unusual!!!!! | 01/01/70 00:00 | |
| RE: Really unusual!!!!! | 01/01/70 00:00 | |
| RE: Really unusual!!!!! | 01/01/70 00:00 | |
| RE: MY TEST PROGRAM... | 01/01/70 00:00 | |
| Keil: Windows vs. command line | 01/01/70 00:00 | |
| RE: Keil: Windows vs. command line | 01/01/70 00:00 | |
| RE: Keil: Windows vs. command line | 01/01/70 00:00 | |
| STILL NOT WORKING | 01/01/70 00:00 | |
| I've got it !!!!!!!!!!!!!! | 01/01/70 00:00 | |
| RE: Keil: Windows vs. command line | 01/01/70 00:00 | |
RE: Keil: Windows vs. command line | 01/01/70 00:00 |



