| ??? 08/01/06 20:35 Read: times |
#121521 - anyway Responding to: ???'s previous message |
despite the rather predictable response from eric..the idea is that you can use less pins from your processor to multiplex a display where the standard aproach would require more pins,the only real drawback being the need to source and sink current on the same pin.It may well have been invented by someone called charlie who knows?? It can also be adapted to allow fewer connections for a keyboard matrix |
| Topic | Author | Date |
| reduced pin count multiplexing | 01/01/70 00:00 | |
| with e.g. ST2221A you need 3 pins | 01/01/70 00:00 | |
| No you are right Erik | 01/01/70 00:00 | |
| Well | 01/01/70 00:00 | |
| the wiring is simpler with ST2221A (equivalent) | 01/01/70 00:00 | |
| was it somone named Charlie ... | 01/01/70 00:00 | |
| ??? | 01/01/70 00:00 | |
| check out the appnote.. | 01/01/70 00:00 | |
| Reading the appnote always helps | 01/01/70 00:00 | |
| anyway | 01/01/70 00:00 | |
| who is he? | 01/01/70 00:00 | |
| walking through the description give you a charlie | 01/01/70 00:00 | |
| Small but real benefit | 01/01/70 00:00 | |
| who does your soldering? | 01/01/70 00:00 | |
| A billion dollar assembly house | 01/01/70 00:00 | |
| very small compared to | 01/01/70 00:00 | |
| Statistically or not | 01/01/70 00:00 | |
| I strongly disagree | 01/01/70 00:00 | |
| blah | 01/01/70 00:00 | |
| deterministic vs predictable | 01/01/70 00:00 | |
| and i know | 01/01/70 00:00 | |
| yes, but I am not talking about kettles | 01/01/70 00:00 | |
| just a minute, there, pilgrim ... | 01/01/70 00:00 | |
does not matter when they will happen eventhough ' | 01/01/70 00:00 |