| ??? 04/18/07 04:43 Read: times |
#137399 - pls read this Responding to: ???'s previous message |
First of all I am sorry to return late.
1) I am using Dallas DS89C430 microcontroller. I am using an external xtal OSCILLATIOR of 33MHz. What I want to ask is this--- What value of resistance must be connected between xtal OSCILLATIOR's output pin3 and the input pin of microcontroller i.e xtal1. 2) Another interseting point which came in this discussion is that -- is it possible to connect a resistance between xtal1(i.e xtal1 input pin of microcontroller) and xtal2(i.e xtal2 output pin of microcontroller). What purpose will it serve? Can we get an output frequency from xtal2 pin of controller without giving the input at xtal1? 3) I do not know the chip you use, but if it has internal code and data memory and you run off it, there may, correctly, be no ALE. As i said the chip is DS89C430. Do u mean to say that if we try to access the internal code and data memory beyond the chip supports, there will be no ALE? |
| Topic | Author | Date |
| DS89C430 - - - - -- ALE SIGNAL | 01/01/70 00:00 | |
| Please explain... | 01/01/70 00:00 | |
| explained here | 01/01/70 00:00 | |
| please explain | 01/01/70 00:00 | |
| he probably uses an external crystal oscillator... | 01/01/70 00:00 | |
| Oscillator Feedback Resistor | 01/01/70 00:00 | |
| a thought and a question | 01/01/70 00:00 | |
| There will be ALE on MOVX cycles | 01/01/70 00:00 | |
| pls read this | 01/01/70 00:00 | |
| That\'s not what I said ... | 01/01/70 00:00 | |
| Is this all about 'running without a crystal'? | 01/01/70 00:00 | |
| still at same stage | 01/01/70 00:00 | |
| Please explain ... What do you mean? | 01/01/70 00:00 | |
| Reflections upon your described predicament | 01/01/70 00:00 | |
| do you think he's using a 'scope? | 01/01/70 00:00 | |
| The rigth person | 01/01/70 00:00 | |
late response ... | 01/01/70 00:00 |