DS1305 DATASHEET PDF

DSE. Pin TSSOP. DSEN Pin TSSOP (Industrial). PIN ASSIGNMENT. DS Serial Alarm Real Time Clock (RTC) VCC2. 1. DS Maxim Integrated Real Time Clock Serial Alarm RTC 3-Wire datasheet, inventory, & pricing. Maxim Integrated DS+: available from 18 distributors. Explore Integrated Circuits (ICs) on Octopart: the fastest source for datasheets, pricing, specs.

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Two programmable time-of-day alarms are provided by the DS The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections datasheeet leap year.

Real-time clock counts seconds, minutes, hours, date, month, day, year, and leap year to Underwriters Laboratory UL Recognized. Upon initial power-up, the state of the WP bit is undefined.

Except where otherwise noted, the initial power on state of all registers is not defined. To prevent accidental enabling, only a pattern of enables the trickle charger.

When high, the hour mode is selected. The time-ofday alarms can be programmed to assert daasheet different interrupt outputs or to assert one common interrupt output.

Also the CE chip enable is connected to pin Also note that registers 12h to 1Fh read and registers 92h to 9Fh are reserved. Each alarm can generate an interrupt on a programmable combination of seconds, minutes, hours, and day.

These bits always read 0 regardless of how they are written. The DS does not write-protect itself in this configuration.

DS RTC using 3-wire mode

If not used, VBAT must be connect to ground. Thepower the DS Combining these two libraries should give the desired result? The alarms can be programmed by the INTCN bit of the control register to operate in two different modes; each alarm can drive its own separate interrupt output or both alarms can drive a common interrupt output.

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Bit 6 of the hours register is defined as the or hour mode select bit.

I would need to convert that library to use 3-wire. Photograph Features Real-time clock counts seconds, datasueet, hours, date, month, day, year, and leap year to byte, battery-backed, nonvolatile NV RAM for data datasueet Two time of day Alarms Serial interface SPI or standard 3-wire interface Dual-power supply pins for primary and backup power supplies Optional trickle charge output to Backup Supply Underwriters Laboratory UL Recognized. Vcc 2 w'” Power the DS Dwtasheet INT0 pin can be programmed to be asserted by only Alarm 0 or can be programmed to be asserted by either Alarm 0 or Alarm 1.

The simplified schematic of Figure 4 shows the basic components of the trickletypicalVCC1 will power the DS No abstract text available Text: The DS contains two time-of-day alarms.

Maxim Integrated Products DS External circuit noise coupled into the oscillator circuit can result in the clock running fast. The maximum current IMAX would, therefore, be calculated as follows: For more information on crystal selection and crystal layout considerations, refer to Application Note Time-of-day Alarm 1 can be set by writing to registers 8Bh to 8Eh.

From a quick overlook datawheet the code I’d guess that changing the defines: However, the countdown chain is reset when the seconds register is written. The chip supports both modes.

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Time-of-day Alarm 0 can be set by writing to registers 87h to 8Ah. Each alarm can generate ancontrols the trickle charge characteristics of the DS The following paragraphs describe the function of each pin.

DS Datasheet(PDF) – Dallas Semiconductor

The simplified schematic of Figure 3 shows the basic components of the trickle charger. The INT0 pin remains low as long as the status bit causing the interrupt is present and the corresponding interrupt enable bit is set. The trickle-charge select TCS bits bits 4—7 control the selection of the trickle charger. The INT1 pin is an active-low output of the DS that can be used as an interrupt input to a processor. Values that correspond to the day of week are user-defined but must be sequential e.

The DS can be run in either hour or hour mode. Configuration 2 illustrates the DS being backed up by a rechargeable energy source.

DS1305 Datasheet PDF

Three different power-supply configurations are illustrated in Figure 4. When high, ds1350 write protect bit prevents a write operation to any register, including bits 0, 1, 2, and 7 of the control register. The chip-enable signal must be asserted high during a read or a write for both 3-wire and SPI communication. The DS does notto the DS