Hi,
This is extract from some book about PICs:
External oscillator in LP, XT or HS mode
The LP, XT and HS modes support the usage of internal oscillator for configuring clock source. The frequency of this source is determined by quartz crystal or ceramic resonators connected to the OSC1 and OSC2 pins. Depending on features of the component in use, select one of the following modes:
LP mode (Low Power) is used for low-frequency quartz crystal only. This mode is designed to drive only 32.768 kHz crystals usually embedded in quartz watches. It is easy to recognize them by small size and specific cylindrical shape. The current consumption is the least of the three modes;
XT mode is used for intermediate-frequency quartz crystals up to 8 MHz. The current consumption is the medium of the three modes ;and
HS mode (High Speed) is used for high-frequency quartz crystals over 8 MHz. The current consumption is the highest of the three modes.
Author talks about three different modes of EXTERNAL oscilator, but then he says that LP, XT and HS modes support the usage of INTERNAL OSCILATOR. This statement is a contadictive for me and I don't know if this is internal or external mode.
This is extract from some book about PICs:
External oscillator in LP, XT or HS mode
The LP, XT and HS modes support the usage of internal oscillator for configuring clock source. The frequency of this source is determined by quartz crystal or ceramic resonators connected to the OSC1 and OSC2 pins. Depending on features of the component in use, select one of the following modes:
LP mode (Low Power) is used for low-frequency quartz crystal only. This mode is designed to drive only 32.768 kHz crystals usually embedded in quartz watches. It is easy to recognize them by small size and specific cylindrical shape. The current consumption is the least of the three modes;
XT mode is used for intermediate-frequency quartz crystals up to 8 MHz. The current consumption is the medium of the three modes ;and
HS mode (High Speed) is used for high-frequency quartz crystals over 8 MHz. The current consumption is the highest of the three modes.
Author talks about three different modes of EXTERNAL oscilator, but then he says that LP, XT and HS modes support the usage of INTERNAL OSCILATOR. This statement is a contadictive for me and I don't know if this is internal or external mode.
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