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디지털 오실레이터 -MIC1557 모듈
(CLOCK GEN 6 CLICK)
개요
특징
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Clock Gen 6 Click as its foundation uses the MIC1557, a low-power digital frequency solution providing the logic for creating a simple RC oscillator circuit from Microchip Technology. The MIC1557 offers rail-to-rail pulses for precise frequency generation alongside a single threshold and trigger connection, internally connected, for astable (oscillator) operation only with programmable output frequency and enable/reset control signal intended as an oscillator with a Shutdown capability.
As mentioned before, the astable oscillator switches between two states, ON and OFF, producing a continuous square wave. The MIC1557 is optimized for this function by tying the two comparator inputs together, the threshold and trigger pins (THR and TRG), forming a T/T pin. The external capacitor charges slowly through the external resistor presented in the form of a digital potentiometer by which the user can pass through the frequency range and thus adjust the desired output.
By replacing the resistor with a digital potentiometer, the user can easily program frequency output as performed on this Click board™. For this purpose, the digital potentiometer MAX5401, which communicates with the MCU via 3-Wire SPI serial interface, is used to set the resistance on the MIC1557 OUT line, adjusting the frequency up to 5MHz.
Alongside SPI communication, this Click board™ also uses one additional pin. The Enable pin, labeled as EN and routed to the RST pin of the mikroBUS™ socket, optimizes power consumption and is used for power ON/OFF purposes (controls the bias supply to the oscillator's internal circuitry). When the MIC1557 is deselected, the supply current is less than 1μA, and the device is placed in a Shutdown state. Forcing the EN pin low resets the device by setting the flip flop, causing the output to a low logic state.
This Click board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the communication lines properly. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.
SPECIFICATIONS
Type Clock generator Applications Can be used for applications such as pulse generation, precision timer, time-delay generation, and more On-board modules MIC1557 - RC oscillator from Microchip Technology Key Features Low power consumption, high precision, astable oscillator operation, programmable output, enable/reset feature, and more Interface GPIO,SPI Compatibility mikroBUS Click board size S (28.6 x 25.4 mm) Input Voltage 3.3V or 5V
문서
연관제품
- 연관제품 1
