| ??? 01/03/08 16:13 Read: times |
#149004 - The 8051's Quasi-Bidirectional IO is ideal! Responding to: ???'s previous message |
It gives you an open-drain driver to pull the line low, and can simultaneously read the line state - unlike some other architectures, where IOs have to be specifically configured as either input or output.
Jae-yong Kim said:
Firstly, we were going to use DS2480 1-wire driver but we thought we can implement 1-wire interface without this chip. Sure it can be done! The Maxim website has loads of Application Notes that tell you how! I didn't do much job on micom, so I don't know much about it. So, it can be done - but are you ready to do it? The DS2480 relieves you of all the work of designing the hardware, and writing the low-level software to bit-bang the critical timing - it becomes just a matter of sending & receiving bytes via the UART. If you don't feel happy with having to study the datasheets in detail, work out the necessary bit sequences, code the timing-critical bit-bang software, etc, then maybe you'd be best to stick with the DS2480? Also, do you need all the features of the DS2480 - including 12V programming pulses, driving long lines, "hard" pullups, etc, etc...? |
| Topic | Author | Date |
| 1-wire interface | 01/01/70 00:00 | |
| sure you can | 01/01/70 00:00 | |
| Is term 'micom' new to you? | 01/01/70 00:00 | |
| I'd never heard of it! | 01/01/70 00:00 | |
| Micom | 01/01/70 00:00 | |
| The 8051's Quasi-Bidirectional IO is ideal! | 01/01/70 00:00 | |
| It is all in the App Notes | 01/01/70 00:00 | |
| RE: It is all in the App Notes | 01/01/70 00:00 | |
| Thanks | 01/01/70 00:00 | |
On the Web site | 01/01/70 00:00 | |
| Cross-reference - the delay function | 01/01/70 00:00 |