| ??? 01/15/07 09:52 Read: times |
#130812 - Reak! Responding to: ???'s previous message |
Adrian Worley said:
I used the same term that the guy who demonstrated the Bluetooth gear used. He said the BT module had a real UART, and that it worked at a nominal 3.3V. He asked if the UART in the AT89C55WD was a real UART. I am trying to answer that question. I see! To answer his question, you need to find what he meant by a "real" UART! The AT89C55WD does contain an actual hardware UART; but that doesn't necessarily mean that your system is using it! That shouldn't matter to the Bluetooth unit - all it should need should be the correct timings and correct voltages. I couldn't find a description of the pins in the Atmel spec sheet, http://www.atmel.com/dyn/resou...oc1921.pdf (section 10) The voltage specs are in the table on p26 - "27. DC Characteristics" |
| Topic | Author | Date |
| AT89C55WD UART voltages. | 01/01/70 00:00 | |
| Level translation | 01/01/70 00:00 | |
| Thanks for that. | 01/01/70 00:00 | |
| Real? | 01/01/70 00:00 | |
| Real | 01/01/70 00:00 | |
| Reak! | 01/01/70 00:00 | |
| Voltage. | 01/01/70 00:00 | |
| Pins | 01/01/70 00:00 | |
| Pins | 01/01/70 00:00 | |
| the peculiar port structure of '51 | 01/01/70 00:00 | |
| The Socket | 01/01/70 00:00 | |
| Socket | 01/01/70 00:00 | |
| HW issues | 01/01/70 00:00 | |
| I am on the road, but someone can verify | 01/01/70 00:00 | |
| SN74LVC4245A | 01/01/70 00:00 | |
| 5V->3V conversion and vice versa | 01/01/70 00:00 | |
| If this is CMOS | 01/01/70 00:00 | |
| No insistance. | 01/01/70 00:00 | |
a link would be nice | 01/01/70 00:00 | |
| PLCC44 | 01/01/70 00:00 | |
| why AT89C55WD? | 01/01/70 00:00 | |
| Read the thread! | 01/01/70 00:00 | |
| AT89LV55? | 01/01/70 00:00 | |
| What is the blue tooth module? | 01/01/70 00:00 | |
| Module | 01/01/70 00:00 | |
| modules | 01/01/70 00:00 | |
| Modules | 01/01/70 00:00 |