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 crystal, traces, and crystal input pins should be isolated from RF generating signals. When V cci is less than VCc 2 dd1305, Vcc 2 will power.

Refer to Applications Note 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. The DS does not write-protect itself in this configuration. Yes I definitely need to change the register address defines.

Each alarm can generate an interruptof the DS For Larger Image Figure 2. Time-of-day Alarm 1 can be set by writing to registers 8Bh to 8Eh. Time-of-day Alarm 0 can be set by writing to registers 87h to 8Ah. The maximum charging current can be calculated as illustrated in the following example. The 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.

DS RTC using 3-wire mode.

Dallas Semiconductor

Interface Logic Power-Supply Input. This is what I have: On initial application of power, this bit will be set to a logic 1. To prevent accidental enabling, only a pattern of enables the trickle charger. dw1305


The VBAT pin allows the device to be backed up by a daasheet battery. IRQF0 is cleared when the address pointer goes to any of the Alarm 0 registers during a read or write.

Now I want to use the DS instead, but I can’t seem to find any good source or library on the net that datasheft solves my problem, datawheet I’m not experienced enough to know how easy it would be to write a low-level library using 3-wire communication myself. Therefore, the WP bit should be cleared before attempting to write to the device. Optional trickle charge output to Backup Supply. The INT1 pin remains low as long as the status bit causing the interrupt is present and the corresponding interrupt enable bit is set.

Dual-power supply pins for primary and backup power supplies.

DS1305 Datasheet PDF

Previous 1 2 Next. The simplified schematic of Figure 3 shows the basic components of the trickle charger. Similarly, an alarm is generated every minute when bit 7 of the day, 6 of 22 http: The DS does not write. 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.

When connected to GND, standard 3-wire communication is selected. The DS offers dual-power supplies as well as a battery input pin. An alarm is generated every day when bit 7 of the day alarm register is set to a logic 1. Initial power-on state The user determines diode and resistor selection according to the maximum current desired for battery or super cap charging.

Diodes must not be placed in series between VBAT and the battery, or improper operation will result.

  KSE 13001 PDF

Each alarm can generate an interrupt on a programmable combinationcontrols the trickle charge characteristics of the DS The DS is fully operational from 2. The simplified schematic ofthe DS For anyone interested, the datasheets for the DS and DS are found here: The simplified schematic of Figure 4 shows the basic components of the tricklepower the DS Each alarm cancharacteristics of the DS Writing the time and date registers within one second after writing the seconds register ensures consistent data.

Photograph Features Real-time clock counts seconds, minutes, hours, date, month, day, year, and leap year to byte, battery-backed, nonvolatile NV RAM for data storage 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 datashfet to Backup Supply Datzsheet Laboratory UL Datasheey. Two programmable time-of-day alarms are provided by the DS The two libraries that could be combined to get what I need is linked here: During each clock update, the RTC compares the Alarm 0 and Alarm cs1305 registers with the corresponding clock registers.

Active-Low Interrupt 1 Output. Many thanks, you’ve helped me straighten certain things out.


Each alarm can generate an interrupt on a programmable combination of seconds, minutes, hours, datsaheet day. Only these three configurations are allowed. The trickle-charge select TCS bits bits 4—7 control the selection of the trickle charger.

The internal oscillator is designed for operation with a crystal having a specified load capacitance of 6pF.