CLKOUT on PIC 18f26k20

[faqrul]

hi i am new in programming. i have one problem. i need clock output. as i read in the datasheet of pic18f26k20, it can provide clock output at pin CLKOUT. since i need to minimize components use, i use internal oscillator. what i read from datasheet if i use INTOSC, i can get Fosc/4 at pin A6.

this is my program.

[asmboy]

you need to check the header file and select
the proper fuse.

i think
INTRC
is not correct for this part -to get clock out
ALSO without HSPLL selected - trying to set
use_delay of 64mhz maybe in conflict with the limited number of
#fuses you have now.

[faqrul]

thanks for reply. i were checked the header. i think for select oscillator only this choices LP,XT,HS,RC,EC,EC_IO,H4,RC_IO,INTRC_IO,INTRC. i have check for datasheet for oscillator. they give ten of choices,

1. LP Low-Power Crystal
2. XT Crystal/Resonator
3. HS High-Speed Crystal/Resonator
4. HSPLL High-Speed Crystal/Resonator with PLL enabled
5. RC External Resistor/Capacitor with FOSC/4 output on RA6
6. RCIO External Resistor/Capacitor with I/O on RA6
7. INTOSC Internal Oscillator with FOSC/4 output on RA6 and I/O on RA7
8. INTOSCIO Internal Oscillator with I/O on RA6 and RA7
9. EC External Clock with FOSC/4 output
10. ECIO External Clock with I/O on RA6

so i think i should use INTRC. just now i was change the clock to 8MHz but i got same result. do u have suggestion which #fuses i need use?

thank you very much

[asmboy]

look at the .LST file generated on successful compile.

at the end is a list of the actual fuse words that will be programmed to the chip

then see how what you want is represented by comparing the generated fuse words with the datasheet for your part.

here is an example for a different pic than yours ( 18f4620) in a project compile i did a few minutes ago.

it is an 18f family member and gives you a sense of what you are looking for:

[Ttelmah]

What you are trying, should work.

However you may well need to use a 'setup_oscillator' line after booting to get it to do what you want. Key is that in INTRC mode, the PLL, is _not_ configurable through the fuses. Some versions of the compiler, are 'smart', and will try to set things up, but on most you have to tell them what you want.
So:

[faqrul]

I just follow Ttelmah and its work.. but the clock can't set 64MHz. If i set 64MHz, the delay is not correct (i refer to pin b0 since it has delay). The delay will be almost 3 second. Clock out at pin A6 i got 4MHz. When i set clock at 16MHz, the delay work fine. but it ok. I just use 16MHz for clock.

Thank you very much asmboy and Ttelmah for helping me.

[Ttelmah]

May be a compiler version problem. I'll have to check if 4.128, correctly sets the PLL. Sounds as if it doesn't. That would then give 16MHz when 64Mhz is selected. 4:1.
Try: