Ceramic Resonator For Microcontroller

Stray capacitance is the addition of the mcu pin capacitance osc in and osc out and the pcb capacitance.

Ceramic resonator for microcontroller. Crystal oscillator or ceramic resonators. My custom board uses a murata cstce16m0v13c99 r0. Ceramic resonators often have them included as in this case. Works fine with an atmega328p au.

Choosing a capacitor capacitance for a quartz resonator atmega328p 1. In most cases resonators with internal capacitors are used. This is an automotive grade 16mhz resonator and has 15pf capacitors built in. I m not sure it matters too much with ceramic resonators.

Rext rf q c l1 l2. It is a parasitical capacitance. Internal feedback resistor rext. Microcontroller clock support solutions introduction the majority of clock sources for microcontrollers can be grouped into two types.

The ceramic resonators are also offered with integrated load capacitors. Can i use ceramic resonator for atmega328p. I believe they re designed to work with whatever value they come with. Connecting a ceramic resonator to an 8051 microcontroller many simple consumer applications where accurate timing is not required and cost is an issue make use of ceramic resonators.

Ceramic resonators for the same frequency range are typically used in 3rd overtone mode for a clock frequency higher than 12mhz. Those based on mechanical resonant devices such as crystals and ceramic resonators and those based on electrical phase shift circuits such as rc resistor capacitor oscillators. Endgroup leon heller mar 22 13 at 3 45. Microcontrollers apnote ap242401 ceramic resonator oscillators and the.

They may save you a few cents if you don t need the accuracy of quartz but in my mind the main advantage is that you can get ceramic resonators with integrated load capacitors. Crystals ceramic resonators rc oscillators and silicon oscillators are four types of clock source suited for use with microcontrollers. A ceramic resonator used in 3rd overtone mode needs no tank circuit. Microcontroller clock rc oscillator crystal or resonator.

Last and least. Separate gnd plane for microcontroller crystal resonator. The crystal oscillators or ceramic resonators are connected with the pins osci and osc2 in lp xt or hs modes for establishing the oscillating. The optimum clock source type for a particular application is dependent on factors including cost accuracy and environmental parameters.

Ceramic resonators are less accurate than crystals. The same resonator can be used with any member of the 8051 family figure 4 7. Common tolerances are 1000 to 5000 parts per million. Crystal quartz or a ceramic resonator rf.