M48T18-100PC1

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M48T18-100PC1 Application Field and Working Principle

M48T18-100PC1 belongs to the family of Real Time Clock (RTC). It is used for timing applications in the system and is especially well suited for embedded systems. In conjunction with the RTC peripheral, this device is able to provide accurate timekeeping functions, even when the system is powered down.

M48T18-100PC1 incorporated an RTC peripheral and a programmable back-up register that can store a set of configuration words (CWord). This allows system designers to tailor the RTC’s behavior according to their precise requirements. The performance and accuracy of the clock is determined by the oscillator used. The precision of the clock is maintained by applying the proper techniques such as choosing the right crystal and choosing the best filter.

M48T18-100PC1 is a low-power consumption device with a very low frequency of 32.768 kHz, offering an accurate time with less than a second of drift over a year. The key features of M48T18-100PC1 are a very low power consumption, a great accuracy of +/-2ppm, a very wide range of supply voltage (1.8V - 5V), and low power-loss mode.

The working principle of the M48T18-100PC1 is based on a 32.768 kHz quartz oscillator that is converted into digital pulses and further processed on board, resulting in a synthesized clock signal. The oscillator is enabled by default, providing a clock signal as long as supply voltage is present. The clocks signals generated by M48T18-100PC1 are designed to be driven off the same power rail as other peripherals in the system, thus allowing the synchronization of multiple peripherals. When enabled, the oscillator can be divided by a programmable prescaler, allowing applications to select the frequency at which they operate.

M48T18-100PC1 has a set of register that stores the time according to UTC-time (Universal Time Coordinated) and provides 12/24 hour support along with BC/AD year selection. The module also has Data/Time change/Input capability, providing the system with the ability to process external time/date signals and trigger conditions from the system. Additionally, the device offers an internal battery back-up that allows timekeeping functions to be continued even when the system power is lost.

M48T18-100PC1 is capable of triggering events at predefined times and can be used for multiple applications such as system shut-down, system wake-up, registers reset, etc. Furthermore, the clock supports circadian sleep/wake modes, automatic alarms, auto-retriggerment, interrupt enable/disable function, one-time BCD logging, etc.

The wide range of options and features make M48T18-100PC1 a suitable choice for all kinds of timing applications and makes it the most efficient and effective device in the family of Real Time Clocks.

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