Internal Oscillator modes on a 16F627A

[Will]

Hi all,
I am trying to set a 16F627A up to use it's nice 4MHz internal oscillator. The datasheet says "Run-time selectable between 4MHz and 37kHz". I am using the #fuses INTRC and set the #use delay to 4,000,000 Is the CCS compiler setting things up for me automatically to use the 4MHz internal oscillator option. I can't see a command to switch between the two speeds. Do I have to do it manually?

Keep well all,

Will

[PCM programmer]

Use the #bit statement to define the OSCF bit. Example:

#bit OSCF_BIT = 0x8E.3

// Now create your own function with a macro.
#define set_osc_freq(value) OSCF_BIT = value

// Define the two possible speeds, based on the data sheet's
// values for OSCF bit, in the PCON register.
#define OSC_4_MHZ 1
#define OSC_37_KHZ 0

// Now use them like this:

main()
{
set_osc_freq(OSC_4_MHZ); // Start at 4 MHz

// Put some other code in here.

set_osc_freq(OSC_37_KHZ); // Change to low speed clock

while(1);
}

[Will Reeve]

Thanks again PCM, what would this group do without you!

Keep well,

Will