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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The DS does not write protect itself in this configuration. DC power is provided to the device on this pin.

Configuration 1 shows the DS being backed up by a nonrechargeable energy source such as a lithium battery. Active-Low Interrupt 1 Output. Serial interface SPI or standard 3-wire interface. An alarm is generated every day when bit 7 of the day alarm register is set to a logic 1. Some differences from DS to DS Except where otherwise noted, the initial power on state of all registers is not defined.

Configuration 2 illustrates the DS being backed up by a rechargeable energy source. Time-of-day Alarm 0 can be set by writing to registers 87h to 8Ah. Maxim Integrated Products DS Two programmable time-of-day alarms are provided by the DS Real-time clock counts seconds, minutes, hours, date, month, day, year, and leap year to Pin Description Pin Number Description 1. Each alarm can generate an interrupt on a programmable combination of seconds, minutestrickle charge characteristics of the DS Still some fixing up remaining, to ensure that it always calculates the time and date fields correctly conforming to the datasheet.

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Illogical time and date entries result in undefined operation. If the corresponding alarm interrupt enable bit is enabled, an interrupt output is activated. Two time of day Alarms. After the address, one or more. For more information on crystal selection and crystal layout considerations, refer to Application Note The DS offers dual-power supplies as well as a battery input pin.

Now I want to use the DS instead, but I can’t seem to find any good source or library on the net that directly solves my problem, and I’m not experienced enough to know how easy it would be to write a low-level library using 3-wire communication myself.

Each alarm can generate an interrupt on a programmable combination of seconds, minutes, hoursThis register controls the trickle charge characteristics of the DS During each clock update, the RTC compares the Alarm 0 and Alarm 1 registers with the corresponding clock registers. The INT1 pin remains low as long as the status bit causing the interrupt is present and the corresponding interrupt enable bit is set.

The INT0 pin remains low as long as the status bit causing the interrupt is present and the corresponding interrupt enable bit is set. If not used, VBAT must be connect to ground.

When V cci is less than VCc 2Vcc 2 will power.

DS1305 Datasheet PDF

After the address, one. W hen V qq – is less than V qq2, V qq2 will. The INT0 pin is an open-drain output and requires an external pullup resistor. Only these three configurations are allowed. Values that correspond to the day of week are user-defined but must be sequential e. Hello, I’m doing a project with the Arduino Mega, and I’m looking for a way to communicate with the DS real time clock, but I need to use the so-called 3-wire mode, not the 4-wire “true” SPI everyone else seem to be using.

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DS Datasheet(PDF) – Dallas Semiconductor

The chip-enable signal must be asserted high during a read or a write for both 3-wire and SPI communication. When high, the hour mode is selected. Each alarmtrickle charge characteristics of the DS The INT1 pin is an open-drain output and requires an external pullup resistor.

The time-ofday alarms can be programmed to assert two different interrupt outputs or to assert one common interrupt output. IRQF1 is cleared when the address pointer goes to any of the Alarm 1 registers during a read or write. Configuration 3 shows the DS in battery operate mode where the device is powered only by a single battery.

Many thanks, you’ve helped me straighten certain things out. The INT1 pin can be programmed to be asserted by Alarm 1 only.

The trickle-charge select TCS bits bits 4—7 control the selection of the trickle charger.