DS Maxim Integrated Real Time Clock Serial Alarm RTC 3-Wire datasheet, inventory, & pricing. Maxim Integrated DS+: available from 13 distributors. Explore Integrated Circuits (ICs) on Octopart: the fastest source for datasheets, pricing, specs. The DS serial alarm real-time clock (RTC) provides a full binary coded decimal (BCD) clock calendar that is accessed by a simple serial interface.

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This allows an easy interface to 3-volt logic in mixed. I salvaged the CR Lithium battery and its holder ds13306 a defunct computer motherboard. In any event, it’s more useful ds1306 datasheet we write our own! The DS is fully operational from 2.

Dallas Semiconductor

I have very little experience with the Arduino system, no experience with the Arduino implementation of SPI and no experience with the DS either so this project should be fun! The first step is to build the circuit around the DS ds1306 datasheet a breadboard.

The 8-bit seconds register stores the units of seconds in bits 0, 1, 2 and 3 and ds1306 datasheet tens of seconds in bits 4, 5 and 6.

A 1 Hz and. The next step is to read the Ds1306 datasheet, Minutes and Seconds registers, decypher how the data is presented and display it on the Arduino serial monitor. The DS Datasheet shows a typical circuit.

Arduino, SPI and the DS RTC – Page 2

You will notice some small but significant changes in the circuit I’ve used, which is shown below. The DS offers dual power supplies as well as a battery input pin. The DS datasheet shows the read address of ds1306 datasheet seconds register is 00h 0x00 so we ds1306 datasheet modify the loop function ds1306 datasheet the sketch above to show the contents of that register: The problem can be seen in the register map above.


If the chip is working and the crystal is oscillating, a 32kHz square wave should be seen at this pin.

This is a low current logic level output not really designed to drive an LED so keep the series resistor as high as possible and use a low ds1306 datasheet LED. The dual power supplies support a programmable trickle charge circuit which dattasheet a rechargeable ds1306 datasheet source such as a super cap or rechargeable battery to be used for a backup supply.

A 1 Hz and a 32 kHz clock output are also available. Two programmable time of day alarms are provided by the DS It ds106 sensible to start with the seconds register since this is obviously changing more rapidly than minutes ds1306 datasheet hours and will enable us to see if the data read from the register is as we’d expect it ds1306 datasheet be.

The end of the month date is automatically adjusted for months with less than 31 days, including corrections for leap year.

I initially tried a male header but the pins had a tendency ds1306 datasheet push through the header’s plastic when it was inserted into the breadboard.

Dallas Semiconductor – datasheet pdf

Bit 7 is always ‘0’. The V Ds1306 datasheet pin allows the device to be backed up by a non-rechargeable battery. The search term ‘Bcd2Dec’ appears regularly on the Web but I haven’t been able to discover if it’s native to Arduino. The 32kHz watch crystal is tiny and won’t plug directly into the breadboard dtaasheet I soldered it to the top of a two-way female header. Each ds1306 datasheet can generate an interrupt on a programmable combination of seconds, minutes, hours, and day.


Other bits in the register control the chip’s two Ds1306 datasheet outputs and also determine whether the chip’s other registers which contain dataheet time and date are ds1306 datasheet.

The value is stored in the register as Binary Coded Decimal – or BCD – so we need to manipulate the 8-bit byte as two separate 4-bit “nibbles”. Sd1306 addition 96 bytes of nonvolatile RAM are provided for data storage.

This allows ds1306 datasheet easy interface to 3-volt logic in mixed supply systems. The following paragraphs describe the function of each pin.

An easy-to-use address and data format is implemented in which data transfers can occur 1 byte at a time or in multiple-byte burst mode. The contents of the Control Register are random when the chip is first powered on so the LED may or may not ds1306 datasheet blinking.

The end of the month date is automatically adjusted for months ds1306 datasheet less than 31 days. The ds1306 datasheet operates in either the hour or hour format with. Electronic Xs1306 Datasheet Search. In order to check if the wiring to the chip was sound ds1306 datasheet before any arduino software was written – I hooked up my ancient oscilloscope to the DS pin Part Name Included start with end match.

The V BAT pin allows the device to.