P1c18f26k20-internal clock set up fail -64mhz

[EarlyBird2]

i read the post of: http://www.microchip.com/forums/m730158.aspx

Very interesting thanks.

Yes one of the settings that worked in the above link is.

__CONFIG _CONFIG1H, _FOSC_INTIO67_1H
OSCCON = $70
OSCTUNE = $40

Is that not what you started with?

[MINHLE]

Y]hello,

yes the above is work.
..
osccon = $70 or (60)
osctune = $40

for single leds
i move to drive 595 then there r problem- lost power or low speed @ out put

now i try to clean the pbp to see waht happen'

thenak for your help.
regards

[MINHLE]

HI ALL,

the pic run well @ 4mhz ,HSPLL; 8, 10mhz ... problem (HSPLL).

the conf. remains unchanged

__CONFIG _CONFIG1H, _FOSC_HSPLL_1H & _FCMEN_OFF_1H & _IESO_OFF_1H
__CONFIG _CONFIG2H, _WDTEN_ON_2H & _WDTPS_512_2H
__CONFIG _CONFIG3H, _CCP2MX_PORTC_3H & _PBADEN_OFF_3H & _LPT1OSC_OFF_3H & _HFOFST_ON_3H & _MCLRE_ON_3H
__CONFIG _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _XINST_OFF_4L & _DEBUG_OFF_4L

where is the problem?
thanks all for your help
regards

[EarlyBird2]

the conf. remains unchanged

__CONFIG _CONFIG1H, _FOSC_HSPLL_1H & _FCMEN_OFF_1H & _IESO_OFF_1H
__CONFIG _CONFIG2H, _WDTEN_ON_2H & _WDTPS_512_2H
__CONFIG _CONFIG3H, _CCP2MX_PORTC_3H & _PBADEN_OFF_3H & _LPT1OSC_OFF_3H & _HFOFST_ON_3H & _MCLRE_ON_3H
__CONFIG _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _XINST_OFF_4L & _DEBUG_OFF_4L

where is the problem?
thanks all for your help
regards

The conf. has changed from #4

here is the conf.
__CONFIG _CONFIG1H, _FOSC_INTIO7_1H & _FCMEN_OFF_1H & _IESO_OFF_1H
__CONFIG _CONFIG2H, _WDTEN_ON_2H & _WDTPS_512_2H' __CONFIG _CONFIG3H, _CCP2MX_PORTC_3H & _PBADEN_OFF_3H & _LPT1OSC_OFF_3H & _HFOFST_ON_3H & _MCLRE_ON_3H
__CONFIG _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _XINST_OFF_4L

also you said

yes the above is work.
..
osccon = $70 or (60)
osctune = $40

for single leds
i move to drive 595 then there r problem- lost power or low speed @ out put

If it works for single leds then it works and all of your code needs checking. So please post your code so we can help.

[MINHLE]

HI,
thanks for your help.
i suspect st wrong,
i test the whole port b. it runs well (8 leds) - FOSC_INTIO67 (16x4mhz)
However, when attaching portb to the 74hc595 - then 1 of the port pin lost power.
just last week, the system run well @40mhz. (external osc).
now problem is data to send out is not right
i will spend 1 more time to check, and will send the program to you

regards

[richard]

when attaching portb to the 74hc595 - then 1 of the port pin lost power.

I'm not really sure what this means , its rather ambiguous
perhaps a schematic diagram (or a photo) of your setup would be in order

[MINHLE]

HI,,
thANKS A LOT RICHARD,

I MOVE TO USE 18F4620, THE PREVIOUS CONF. IS FINE (internal osc*4 = 32 mhz)
the program runs well @40mhz (external osc) then there are problems
i.e. data output randomly- (due to dirty breadboard)
line appears on the screen (same cause above).
i will going back to see the 18f26k20.next week.

thanks again
regards