| Integrated real-time clock (RTC), power-fail control circuit, and NV RAM controller Clock registers are accessed identically to the static RAM; these registers are resident in the 16 top RAM locations Century register Greater than 10 years of timekeeping and data retention in the absence of power with small lithium coin cell(s) and low-leakage SRAM Precision power-on reset Programmable watchdog timer and RTC alarm BCD-coded year, month, date, day, hours, minutes, and seconds with automatic leap-year compensation valid up to the year 2100 Battery voltage-level indicator flag Power-fail write protection allows for ±10% VCCpower-supply tolerance Underwriters Laboratory (UL) recognized |