M48T08-100PC1

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The M48T08-100PC1 is a real-time clock used for keeping up-to-date time and date information in a computer or an embedded system. It is used extensively in electronics-based applications such as measurement instruments, energy management systems, medical devices, industrial automation controllers and automotive electronics. Real-time clocks are used to provide an external reference source to synchronize internal logic. Developed by STMicroelectronics, the M48T08-100PC1 includes an integrated crystal oscillator, a memory array, support circuitry, and programmable features.

The M48T08-100PC1 is a non-volatile 8-bit device using SRAM technology with a 1,000,000-erase/program cycle endurance and rated for operation over an extended temperature range. Operating from a single 3V lithium coin cell battery, it provides an integrated low power supply, allowing it to keep the time and date even when the main power is disconnected. An internal oscillator generates a clock signal and also provides a precise frequency to the integrated crystal oscillator for maintaining precise frequency accuracy.

The device has a main 64K-bit SRAM array and a programmable calendar time clock register. The register is an eight-bit wide addressable counter that counts in seconds from 00:00:00 (Midnight) to 11:59:59 (one second before Midnight) while passing through 24 hours. An integrated interrupt controller allows the user to generate an interrupt request to the microcontroller at a certain time. The microcontroller can then execute a certain function or routine.

The device can be set up to generate interrupts to the microcontroller in a variety of conditions, for example, when the device first starts up, at the same time every day, during a certain time window, or at a specific minute and second. For example, if one wanted to know what time it is at 3:00 PM every day, they could program the device to generate an interrupt to the microcontroller at that specific time.

The microcontroller can be coupled with the M48T08-100PC1 device to provide functions related to energy management and security. In energy management applications, the device can be programmed to perform energy saving tasks by turning off lights, adjusting temperatures, or reducing the energy consumption of certain appliances. In security applications, the device can be used to activate or deactivate systems or sensors at a certain time, which could help protect homes or businesses from intruders.

In addition, the device can also be used for time and date stamping applications. For example, when a file is saved, the device can be programmed to write the time and date to a memory array, which can then be used for reference in later investigations. This feature makes the M48T08-100PC1 very useful in applications where time and date stamps are required, such as in medical data logging and inventory control.

The M48T08-100PC1 is a versatile and reliable real-time clock device. It bridges the gap between the physical world and the digital world and provides an accurate external reference source for time keeping. With its high-accuracy quartz crystal and its non-volatile memory array, the device can be used for a wide range of applications in automotive, medical, industrial, and consumer markets.

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