| ??? 11/26/06 23:21 Read: times |
#128525 - ah well... Responding to: ???'s previous message |
RESET is active high on the atmel AVR for example and it uses a system whereby the reset line is tied to Vcc via an internal pull-up but there is a programable delay where the processor is held in reset for a few thousand clock cycles after power on. |
| Topic | Author | Date |
| why do we use negative logic in processors&control | 01/01/70 00:00 | |
| Speed | 01/01/70 00:00 | |
| Some previous thoughts | 01/01/70 00:00 | |
| Wire-AND-ing is the remaining benefit | 01/01/70 00:00 | |
| Just imagine ... | 01/01/70 00:00 | |
| ah well... | 01/01/70 00:00 | |
| That would cause one to avoid their devices | 01/01/70 00:00 | |
| because pullup | 01/01/70 00:00 | |
| But why? | 01/01/70 00:00 | |
| TTL outputs | 01/01/70 00:00 | |
| Remarkable advantages when switching to GND | 01/01/70 00:00 | |
| more current | 01/01/70 00:00 | |
| Yes, but why? | 01/01/70 00:00 | |
Physics | 01/01/70 00:00 |