STMicroelectronics Serial RTCs keep track of day-date-time,
even in the absence of power. Instead of the standard asynchronous
parallel SRAM interface, Serial RTCs use a serial bus. Our devices
are available in two industry standard serial interfaces: I²C
(Inter-Integrated Circuit) and SPI (Serial Peripheral Interface).
This calculator allows you to calculate the discharge times for
the devices with external SuperCap connections as illustrated
below (please see Application Note, AN922
for more information). |
