| ??? 06/22/09 19:10 Read: times |
#166366 - no ground plane Responding to: ???'s previous message |
I have a two layer board, it does have GND polygon planes on both sides,
and the freq will be 20MHz. 48MHz is just a way to test faster UART programming, see: http://groups.google.com/group/com...b0d43b5d5# |
| Topic | Author | Date |
| AT89C51ED2 changing speed on its own | 01/01/70 00:00 | |
| apply proper reset | 01/01/70 00:00 | |
| apply proper reset | 01/01/70 00:00 | |
| then that's R0 not R1 | 01/01/70 00:00 | |
| MAX1232 + 4k7 pull-up | 01/01/70 00:00 | |
| I beliebe this chip has a built-in watchdog and thus ... | 01/01/70 00:00 | |
| I don't like those on-chip watchdogs and Vcc monitors | 01/01/70 00:00 | |
| Should be always on | 01/01/70 00:00 | |
| external vs internal | 01/01/70 00:00 | |
| .. | 01/01/70 00:00 | |
| Ground plane? | 01/01/70 00:00 | |
| no ground plane | 01/01/70 00:00 | |
| choose a "magic" frequency crystal ... | 01/01/70 00:00 | |
20MHz and 57600 | 01/01/70 00:00 |