GENERAL DESCRIPTION. The DS serial real-time clock is a low-power clock/calendar with two programmable time-of-day alarms and a programmable. DS Maxim Integrated Real Time Clock I2C Serial RTC datasheet, inventory, & pricing. DS Real Time Clock are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for DS Real Time Clock.

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The master generates a STOP condition. Alarm when date, hours, minutes, and seconds. The RTC registers are. You can see that BF clears after 8 data bits have shifted out. Exposure to the absolute maximum rating conditions for extended periods may affect device reliability.

When reading or writing the time and date registers, secondary user buffers are used to prevent errors when the. The DS operates as a. The first byte is received and handled as in the slave receiver mode. The DS can operate in the following two modes: I have attached an LCD display that works perfectly and i use it to display returned values.


The time and calendar information is obtained by reading the appropriate register bytes. Alarm when day, hours, and minutes match. SDCC include libio library, that have primitives for use i2c bus. A logic 1 in the alarm 1 flag bit indicates that the time matched the alarm 1 registers.

The DSC package contains a quartz tuning-fork crystal. Pin Configurations appear at end of data sheet. For information about device errata, go to: This pin is an. Alarm 1 can be set by writing to registers 07h?

I2C and DS1337 RTC

The day-of-week register increments at midnight. Alarm once per second. However, in this mode, the direction bit indicates that the transfer direction is reversed. External circuit noise coupled into the. These pins are not connected internally, but must be. The DS supports the I C bus protocol.

Changes in the data. Configurations not listed in the table result in illogical operation. A device that acknowledges must pull down the SDA line during the acknowledge clock pulse in such a way that.

I2C and DS RTC | Microchip

The slave address byte is the first byte. The master device must generate an extra clock pulse that is associated with this acknowledge bit. During data transfer, the data line must remain stable whenever the clock line is HIGH. When reading the time and date registers, the user buffers are synchronized to the. The first byte transmitted by the master is the.


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Write transfers occur on the acknowledge. A master device that generates the serial clock SCLcontrols. DC power is provided to the device on these pins. Handling instructions listed on the package.

However, actually i get only seconds register values. But you have not said what results you expect and what results you actually get.

The master returns an acknowledge bit after all received bytes other than the last byte. Refer to Application Note 58 for information about crystal accuracy vs. I choose to read all registers in one I2C transaction, as suggested.

The DS serial real-time clock is a low-power. To prevent that, one should read all the registers in a single transaction.

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