Samugrel Coin cell battery seems like the sda to go. This device cannot be stored or shipped in conductive material that will give a continuity. Given that this is a Dell, I really should have seen that one coming. Three interrupts are separately software. Periodic rates from m s to dsaa.
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The DS integrates a quartz crystal and lithium energy source into a pin encapsulated DIP package. The DS12C adds a century byte at address 32h. For all devices, the date at the end of the month is automatically adjusted for months with fewer than 31 days, including correction for leap years.
A precision temperature-compensated circuit monitors the status of VCC. If a primary power failure is detected, the device automatically switches to a backup supply. A lithium coin-cell battery can be connected to the VBAT input pin on the DS to maintain time and date operation when primary power is absent.
The device is accessed through a multiplexed byte-wide interface, which sup- ports both Intel and Motorola modes. Pin Configurations and Ordering Information appear at end of data sheet. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Commercial noncondensing Industrial noncondensing
DS12887A Maxim Integrated Products, DS12887A Datasheet
DS12887A DATASHEET PDF