How to use internal oscillator of PIC

[mateeb4u@gmail.com]

I want to test internal oscillator of PIC 18f452.
Does PIC18F452 have Internal oscillator ? I read datasheet but there is no information about internal oscillator. Anyone have example program of Internal oscillator ?

[Ttelmah]

452, does not have internal oscillator. This is why it is not in the data sheet....

If you look at a chip that does (for instance the 4520, which is a latter equivalent chip), and look at the 'oscillator types' section in the data sheet, you see:
"PIC18F2420/2520/4420/4520 devices can be operated
in ten different oscillator modes. The user can program
the configuration bits, FOSC3:FOSC0, in Configuration
Register 1H to select one of these ten modes:
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. INTIO1 Internal Oscillator with FOSC/4 output
on RA6 and I/O on RA7
8. INTIO2 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"

Entries 7, and 8.

Best Wishes