Mikroelektronika d.o.o.
Carte à clic RTC 3
Carte à clic RTC 3
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Overview
Le RTC 3 Click Board™ embarque un BQ32000, une horloge en temps réel avec un circuit de charge d'entretien intégré pour le basculement automatique vers une alimentation de secours (le circuit maintient la charge de secours avec un supercondensateur embarqué).
The RTC 3 Click Board™ is based on the BQ32000, a real time clock with an integrated trickle charge circuit for automatic switchover to a backup power supply (the circuit maintains the backup charge with an onboard super capacitor). The clock frequency is derived from an onboard 32.768KHz oscillator. The RTC 3 Click Board™ communicates with the target board microcontroller through mikroBUS I2C lines: SCL, SDA. In addition, the INT pin serves as a configurable interrupt output. The board is designed to use a 3.3V power supply only.
IC/module: BQ32000
BQ32000 is a real time clock/calendar chip that includes an automatic backup supply that can be implemented using a capacitor or non-rechargeable battery. The integrated trickle charger enable automatic switchover to backup supply. It also includes an integrated oscillator-fail detection flag that indicates the status of the RTC oscillator. The STOP bit allows the host processor to put the oscillator out of action.
I2C Interface
RTC3 Click Board™ communicates with the target board MCU through a two-wire serial interface (mikroBUS I2C). The bus includes a data line (SDA) and a clock line (SCL) with off-chip pullup resistors. The INT pin serves as a configurable interrupt output.
Integrated Trickle Charger
RTC3 Click Board™ includes a trickle charge circuit that maintains the charge of the backup supply when using a super capacitor. It is put into operation as a series of three switches that are independently controlled. Even though the trickle charge circuit is projected for use with super capacitors, it can also be used with a rechargeable battery under specified circumstances.
Frequently Asked Questions
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