| ??? 10/14/05 12:39 Modified: 10/14/05 12:41 Read: times |
#102406 - 4.915200 Responding to: ???'s previous message |
Hi,
In one my project called "Car Clock" I have used 4.915200Mhz crystal. With timer 1 (16-bit mode) and TH1 reload value =240 I have got 100 tics per second which are used for RTC and stop-watch. With timer 2 I have got 38400, 19200, 9600 etc baudrates for UART. Both are with 0,00% deviation. Regards, Oleg |
| Topic | Author | Date |
| Software Based RTC | 01/01/70 00:00 | |
| Context | 01/01/70 00:00 | |
| Link to my RTC - sftware crystal freq. | 01/01/70 00:00 | |
| The precision is depending on the fracti | 01/01/70 00:00 | |
| How to count seconds | 01/01/70 00:00 | |
| How to decide count for a 3.5795Mhz, | 01/01/70 00:00 | |
| the frequency range does not matter | 01/01/70 00:00 | |
| the "tricks" | 01/01/70 00:00 | |
| 3.93216MHz is better | 01/01/70 00:00 | |
| 4.915200 | 01/01/70 00:00 | |
| 3.93216 ?? | 01/01/70 00:00 | |
| 3.93216 is standard frequency | 01/01/70 00:00 | |
| Can i have some clarifications on XTALS | 01/01/70 00:00 | |
| manufacturing tolerances | 01/01/70 00:00 | |
| low frequencies Crystals are bigger ? | 01/01/70 00:00 | |
| 32.768kHz means low current consumption | 01/01/70 00:00 | |
| so higher Frequeny crystals are accurate | 01/01/70 00:00 | |
Yes! | 01/01/70 00:00 | |
| The Right Frequency | 01/01/70 00:00 |