| ??? 11/03/00 15:43 Read: times |
#6190 - RE: How to Generate 3 MHz Clock Signal? |
The Intel (and equivalent Philips parts)87C51Fx allow P1.0 to be used as a "clock out" for Timer 2. The maximum frequency is 1/4 the oscillator. If you change to a higher frequency oscillator you can generate a 3MHz clock out frequency. The 87C51Fx is available in speeds up to 20MHz.
The frequency of the clock out signal is set by a one time writing of a value to registers RCAP2H and RCAP2L. The formula for the frequency is: Fosc/(4*(65536 - RCAP2H,RCAP2L)) It is spelled out nicely in the user's manual. I've used it, it works. Question: Why do you need a 3MHz clock? 8 bits to ya' Allen |
| Topic | Author | Date |
| How to Generate 3 MHz Clock Signal? | 01/01/70 00:00 | |
| RE: How to Generate 3 MHz Clock Signal? | 01/01/70 00:00 | |
| RE: How to Generate 3 MHz Clock Signal? | 01/01/70 00:00 | |
| RE: How to Generate 3 MHz Clock Signal? | 01/01/70 00:00 | |
| RE: How to Generate 3 MHz Clock Signal? | 01/01/70 00:00 | |
| RE: How to Generate 3 MHz Clock Signal? | 01/01/70 00:00 | |
| RE: How to Generate 3 MHz Clock Signal? | 01/01/70 00:00 | |
RE: How to Generate 3 MHz Clock Signal? | 01/01/70 00:00 |