A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a moving crystal of piezoelectric material to form an electrical signal with a very precise frequency. This frequency is often used to keep track of your time (as in quartz wristwatches), to produce a stable clock signal for digital integrated circuits, and to stabilize frequencies for radio transmitters and receivers. The foremost common style of electricity resonator used is that the quartz, therefore oscillator circuits incorporating them became called crystal oscillators,but alternative piezoelectric materials as well as polycry stalline ceramics are utilized in similar circuits.
In the design of microprocessors and microcontrollers, crystal oscillators are used for the sake of providing the clock signals. In 8051 microcontroller an external oscillator circuit can work with 12MHz that's essential. This explicit oscillator that has cycle rate at 1MHz to 3.33MHz is used to generate clock pulses. It is required for the synchronization of all the internal operations.
EEPROM
EEPROM stands for electrically erasable programmable read-only storage. it's a non-volatile storage device, that is, keep data is preserved once the power is removed. EEPROM usually offers excellent capabilities and performance. In EEPROM we are able to write and program the IC for several times and these are acting as EPROM (UV eradicable programming ROM).Data saved in AN EEPROM chip is permanent, till the user chooses to delete and replace the information that it contains. The information saved in AN EEPROM chip isn't lost even when power is turned off.
No comments:
Post a Comment