| ??? 12/17/06 14:44 Read: times |
#129629 - details... Responding to: ???'s previous message |
What speed? All 3 simultaneously? Is this an adequate chip to process all the data? Is this a new design? Do you have to stick to AT89C52?
It would help if you'd describe the application in more details. Options are: - get a 2-UART derivative plus some of the solutions below - switch the 1 internal UART (if data are not simultaneous) - softUART if not too high speed and you know exactly what you do - use parallel interfaced external UART - use SPI/I2C interfaced external UART - use a "slave micro" interfaced via I2C/SPI Read http://www.8052.com/faqs.phtml?FAQ=120308 (pointing to Jon Ledbetter's RS232 document) and http://www.8052.com/faqs.phtml?FAQ=124758 . JW |
| Topic | Author | Date |
| newbie interfacing rs232 | 01/01/70 00:00 | |
| details... | 01/01/70 00:00 | |
| re: details... | 01/01/70 00:00 | |
| Automatic serial data switch? | 01/01/70 00:00 | |
| B & B? | 01/01/70 00:00 | |
| A bit OTT? | 01/01/70 00:00 | |
| Try DS89C450, AT89S2051 (qty 2) | 01/01/70 00:00 | |
| Why more microcontrollers? | 01/01/70 00:00 | |
| is an external UART cheaper? | 01/01/70 00:00 | |
| Are we over-complicating this? | 01/01/70 00:00 | |
Can switch autmatically in hardware | 01/01/70 00:00 | |
| Thanks | 01/01/70 00:00 |