| ??? 12/10/07 13:22 Read: times |
#148034 - even better Responding to: ???'s previous message |
If you were to use a SiLabs C8051F120/1/2/3/4/5/6/7 or a C8051F130/1/2/3 and clock the device from a 22.1184 MHz crystal or oscillator it is then possible to use the UART0 on these devices as follows:
use the PLL to multiply by 4 and get 88.whatever for the 100MHz devices or multiply by 2 and get 44.whatever for the 50MHz devices. That gives the timer an even better precision. since you have the PLL, you can reduce EMI and get the same result with an 11.0592MHz xtal. This even allow you to run the 100MHz devices at 99.whatever Erik |
| Topic | Author | Date |
| Unusual Baud Rate! | 01/01/70 00:00 | |
| Nothing special | 01/01/70 00:00 | |
| the same as for the so-called "standard" | 01/01/70 00:00 | |
| Yes! | 01/01/70 00:00 | |
| How do you mean both? | 01/01/70 00:00 | |
| Not at the same time! | 01/01/70 00:00 | |
| OBD requirement, | 01/01/70 00:00 | |
| SO why the secrecy? | 01/01/70 00:00 | |
| why didn't you just mention it in the first place | 01/01/70 00:00 | |
| more explanation, | 01/01/70 00:00 | |
| Autobaud? | 01/01/70 00:00 | |
| if you'd just need one UART switchable between... | 01/01/70 00:00 | |
| Thanks | 01/01/70 00:00 | |
| Simultaneous solution | 01/01/70 00:00 | |
| ±3% of the desired rate, | 01/01/70 00:00 | |
| maybe you can get by ... | 01/01/70 00:00 | |
| 2nd assumption? | 01/01/70 00:00 | |
| consider how it works | 01/01/70 00:00 | |
| 11.5198 MHz! | 01/01/70 00:00 | |
| Try This For Near Exact | 01/01/70 00:00 | |
| Thanks | 01/01/70 00:00 | |
even better | 01/01/70 00:00 | |
| Two Baud to Uarts :) | 01/01/70 00:00 |