| ??? 08/12/05 12:17 Modified: 08/12/05 12:26 Read: times |
#99256 - calculate Responding to: ???'s previous message |
I am using a crystal of 14.7456Mhz at 12 clock curently
How do you expect that to work? an "empty" isr (RETI, nothing else) will make worst case execution 10 instruction cycles (if you have no MUL or DIV instructions 9 instruction cycles) and at your clock and running 12 clocks even an "empty" ISR will occasionally fail. Since an "empty" ISR is not of any use, your case will be worse. WHY did you do this without even calculating the execution time???? When changing to 6 clocks, you better make sure your ISR is less than 6 Icycles long. Erik |
| Topic | Author | Date |
| Interrupt Latency | 01/01/70 00:00 | |
| Clock speed ? | 01/01/70 00:00 | |
| many factors | 01/01/70 00:00 | |
| Just curious... | 01/01/70 00:00 | |
| not that I know of, my recollection evid | 01/01/70 00:00 | |
| Interrupt Latency | 01/01/70 00:00 | |
| calculate | 01/01/70 00:00 | |
| Could you poll instead? | 01/01/70 00:00 | |
| He's got one, but is running it in 12 cl | 01/01/70 00:00 | |
| Another way maybe | 01/01/70 00:00 | |
Depends upon the ISR & crystal | 01/01/70 00:00 |