The end of the month date is automatically adjusted for months with less than 31 days, including corrections for leap year. In addition 96 bytes of nonvolatile RAM are provided for data storage. This allows an easy interface to 3-volt logic in mixed supply systems. The DS offers dual power supplies as well as a battery input pin.
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The end of the month date is automatically adjusted for months with less than 31 days, including corrections for leap year.
In addition 96 bytes of nonvolatile RAM are provided for data storage. This allows an easy interface to 3-volt logic in mixed supply systems. The DS offers dual power supplies as well as a battery input pin. The dual power supplies support a programmable trickle charge circuit which allows a rechargeable energy source such as a super cap or rechargeable battery to be used for a backup supply. The VBAT pin allows the device to be backed up by a non-rechargeable battery.
The DS is fully operational from 2. Two programmable time of day alarms are provided by the DS Each alarm can generate an interrupt on a programmable combination of seconds, minutes, hours and day.
The time of day alarms can be programmed to assert two different interrupt outputs or to assert one common interrupt output. A straightforward address and data format is implemented in which data transfers can occur 1 byte at a time or in multiple-byte burst mode. The following paragraphs describe the function of each pin. Html Pages.
DS1305 DATASHEET PDF
Akir 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.
Shakatilar All other patterns disable the trickle charger. DC power is provided to the device on this pin. The simplified schematic of Figure 3 shows the basic components of the trickle charger. Write protection and clock halt enable oscillator are bit 6 and 7 respectively in the control register. If the corresponding alarm interrupt enable bit is enabled, an interrupt output is activated.
The DS can be run in either hour or hour mode. Bit 6 of the hours register is defined as the or hour mode select bit. When high, the hour mode is selected. In the hour mode, bit 5 is the second hour bit hours. The DS contains two time of day alarms. Time of Day Alarm 0 can be set by writing to registers 87h to 8Ah. Time of Day Alarm 1 can be set by writing to registers 8Bh to 8Eh.