| ??? 04/07/06 12:39 Read: times |
#113809 - Where is this divide by 2? Responding to: ???'s previous message |
The machine cycle for a standard 8051 device is the crystal frequency divided by 12, so for a 12MHz crystal, the machine cycle is 1MHz or 1uS. Some instructions take 1 cycle, some 2 cycles and MUL/DIV 4 cycles. Where is this magic divide by two entering into the equation? I suggest reading the datasheets carefully and giving us a reference if you need specific clarification. Some variants can be switched between 6 clocks and 12 clocks for a machine cycle - if switched to 6 clocks, the machine cycle is twice as fast. |
| Topic | Author | Date |
| Capacitor significance | 01/01/70 00:00 | |
| Search | 01/01/70 00:00 | |
| Why burden caps must not be omitted | 01/01/70 00:00 | |
| Thanks: But still some more | 01/01/70 00:00 | |
| because that is when the address need be | 01/01/70 00:00 | |
| Divide dy 2 | 01/01/70 00:00 | |
| Where is this divide by 2? | 01/01/70 00:00 | |
| Thank you SIR | 01/01/70 00:00 | |
| Beware of applying specifics in general! | 01/01/70 00:00 | |
| Re: clock division... | 01/01/70 00:00 | |
| I suggest you do not | 01/01/70 00:00 | |
| Misleading information | 01/01/70 00:00 | |
| Divide-by-12 = Divide-by-(2*6) | 01/01/70 00:00 | |
| Oops - 1us, not 1ms!! | 01/01/70 00:00 | |
| not exactly ... | 01/01/70 00:00 | |
| it would not be so simple | 01/01/70 00:00 | |
| Clock division - in summary | 01/01/70 00:00 | |
| Re: Clk division summary | 01/01/70 00:00 | |
| Language? | 01/01/70 00:00 | |
| ok ok one more help | 01/01/70 00:00 | |
Links | 01/01/70 00:00 |