| ??? 12/08/04 16:38 Modified: 12/08/04 16:39 Read: times |
#82766 - atmel port 0 Responding to: ???'s previous message |
With configurable ports, you need no buffers, the output will be configured push_pull, all inputs will be open collector. By saying other signals I mean signals from other sours (not signals from the processor). Rereading atmel's 8051 hardware description remind me that port 0 is truly bidirectional (no pull-ups) and if it is configured as input it floats. Can i use port 0 as data/address bus (it is bidirectional but only one tolks at a time) ... and with external buffer to realize the other signals (most of them are only in reading mod from the slave side of view)? |
| Topic | Author | Date |
| Master / slave parallel bus | 01/01/70 00:00 | |
| suggestion | 01/01/70 00:00 | |
| info | 01/01/70 00:00 | |
| config ports | 01/01/70 00:00 | |
| serial parallel ? | 01/01/70 00:00 | |
| various | 01/01/70 00:00 | |
| atmel port 0 | 01/01/70 00:00 | |
| Port 0 as communicator | 01/01/70 00:00 | |
| Sorry, did not look | 01/01/70 00:00 | |
| reply | 01/01/70 00:00 | |
| supplier.. | 01/01/70 00:00 | |
| speed | 01/01/70 00:00 | |
| go on | 01/01/70 00:00 | |
| to the above | 01/01/70 00:00 | |
| Re: to the above | 01/01/70 00:00 | |
| open collector push-pull no way | 01/01/70 00:00 | |
| open collector and upsh-pull | 01/01/70 00:00 | |
| push pull drive, OC receive | 01/01/70 00:00 | |
| How to post ASCII Art | 01/01/70 00:00 | |
| All in one chip! | 01/01/70 00:00 | |
| Why parallel ? | 01/01/70 00:00 | |
CAN or cannot | 01/01/70 00:00 |