| ??? 07/22/05 12:44 Read: times |
#97811 - 1, 2 and here is 3 and 4 Responding to: ???'s previous message |
1: but I am unable to get full TTL signal at output
2: Due datasheet, if source current is above 80uA then VOH is no more than 2.4V 3: if the impedance of your meter is 2.4/80u = 30k Ohm (which is excellent for an analog meter) 2.4 is all you'll see. 4: below it states pins those used by the comparator dont have internal pullups ..... I am getting 2.4V signal on any pin that goes high. DOES NOT matter what pin it is If Abhishek is right, - again, fortunately I have no knowledge of current Atmel chips - and you have no external pullups then your measurement method MUST be faulty. Erik |
| Topic | Author | Date |
| AT89C2051 assistance needed | 01/01/70 00:00 | |
| output load | 01/01/70 00:00 | |
| 1, 2 and here is 3 and 4 | 01/01/70 00:00 | |
and vice versa | 01/01/70 00:00 | |
| my crystal ball says... | 01/01/70 00:00 | |
| re: more info | 01/01/70 00:00 | |
| what Pins? | 01/01/70 00:00 | |
| re : what pins? | 01/01/70 00:00 | |
| Are you | 01/01/70 00:00 | |
| Reset, oscillator | 01/01/70 00:00 | |
| Software! | 01/01/70 00:00 | |
| re: software | 01/01/70 00:00 | |
| not for 5 seconds but | 01/01/70 00:00 | |
| When strange things happen..... | 01/01/70 00:00 | |
| mehndi !!! | 01/01/70 00:00 | |
| sorry Fir that | 01/01/70 00:00 | |
| Try this | 01/01/70 00:00 |