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Mikroelektronika d.o.o.

RTC 9 Click-Platine

RTC 9 Click-Platine

SKU: MIKROE-4121
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£9.80 GBP ohne MwSt
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£9.80 GBP ohne MwSt
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Key Features

RTC 9 click ist eine perfekte Lösung für die Entwicklung des IoT, tragbarer und portabler Geräte, Protokollierungsgeräte, industrieller und gesundheitsbezogener Zeiterfassungsanwendungen und aller anderen Anwendungen, die für verschiedene Zwecke eine genaue Zeitbasis erfordern.
Basierend auf der M41T82, Echtzeituhr (RTC) mit Batterieumschaltung, von ST Microelectronics.
Werkseitig kalibrierte Genauigkeit von ±5 ppm (typisch), automatische Umschalt- und Reset-Ausgangsschaltung, programmierbarer Alarm mit Unterbrechungsfunktion und mehr
Verwendet den I2C-Bus

Overview

Das RTC 9 Click Board™ ist ein Echtzeituhrmodul mit extrem niedrigem Stromverbrauch, sodass es über einen längeren Zeitraum mit einer einzigen Knopfzellenbatterie verwendet werden kann. Diese Platine verfügt über die Echtzeituhr (RTC) M41T82 mit Batterieumschaltung von ST Microelectronics. Sie verfügt über eine werkseitig kalibrierte Genauigkeit von ±5 ppm (typisch), automatische Umschalt- und Reset-Ausgangsschaltung, einen programmierbaren Alarm mit Interrupt-Funktion und mehr.

All diese Funktionen machen RTC 9 Click Board™ zu einer ausgezeichneten Wahl für Hersteller von Anwendungen wie tragbaren Anwendungen, Protokollierungsgeräten, Wearables, medizinischen Geräten und ähnlichem.

How Does The RTC 9 Click Board™Work?

The RTC 9 Click Board™ is based on the M41T82, an extreme low power real-time clock/calendar (RTC) module from ST Microelectronics. Thanks to its high integration level, this module provides high time accuracy, factory calibrated to ±5 ppm even after two reflows, with a very low count of external components required. It has a full RTC function, offering programmable counters, alarms, and an interrupt engine with selectable event reporting sources. The operational parameters are stored within the internal user SRAM memory, which is battery-backed, thus allowing their persistence in the event of the complete power failure.

RTC 9 click inner

M41T82 features a built-in 32.768 kHz oscillator. However, the RTC 9 Click Board™ has an external oscillator too, in order to achieve the best accuracy possible. Eight bytes of the register map are used for the clock/calendar function and are configured in binary-coded decimal (BCD) format. An additional 17 bytes of the register map provide status/control of the two alarms, watchdog, 8-bit counter, and square wave functions. An additional seven bytes are made available as user SRAM. M41T82 supports the I2C communication interface, which is also used on the RTC 9 Click Board™ for communicating with the main microcontroller through the mikroBUS socket.

Functions available to the user include a non-volatile, time-of-day clock/calendar, two alarm interrupts, watchdog timer, programmable 8-bit counter, and square wave outputs. The eight clock address locations contain the century, year, month, date, day, hour, minute, second, and tenths/hundredths of a second in 24-hour BCD format. Corrections for 28, 29 (leap year), 30, and 31 day months are made automatically.

The RTC 9 Click Board™ is designed to be operated with both 3.3V and 5V logic levels that can be selected via VCC SEL jumper. This allows for both 3.3V and 5V capable MCUs to use the I2C communication lines properly.

SPECIFICATIONS

Type RTC
Applications The RTC 9 Click Board™ is a perfect solution for the development of the IoT, wearable and portable devices, logging devices, industrial and health-related time metering applications, and all the other applications that require an accurate time-base for various purposes.
On-board modules M41T82, real-time clock (RTC) with battery switchover, from ST Microelectronics.
Key Features Factory-calibrated accuracy of ±5 ppm typically, automatic switchover and reset output circuitry, programmable alarm with interrupt function, and more
Interface I2C
Compatibility mikroBUS
Click board size M (42.9 x 25.4 mm)
Input Voltage 3.3V or 5V

PINOUT DIAGRAM

This table shows how the pinout on the RTC 9 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes Pin Mikrobus logo.png Pin Notes
NC 1 AN PWM 16 NC
Reset RST 2 RST INT 15 NC
NC 3 CS RX 14 NC
NC 4 SCK TX 13 NC
NC 5 MISO SCL 12 SCL I2C Clock
NC 6 MOSI SDA 11 SDA I2C Data
Power Supply 3.3V 7 3.3V 5V 10 5V Power Supply
Ground GND 8 GND GND 9 GND Ground

ONBOARD SETTINGS AND INDICATORS

Label Name Default  Description
LD1 PWR - Power LED Indicator
JP1 VCC SEL Left Power Supply Voltage Selection 3V3/5V, left position 3v3, right position 5v

RTC 9 CLICK ELECTRICAL SPECIFICATIONS

Description Min Typ Max Unit
Supply Voltage (for R version) 2.70 3.3 5.5 V
Supply Current - 365 - nA
Accuracy - 5 - ppm
Operating Temperature Range -40 - 85 °C

 

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