Intel® Core™ Ultra Processor
Datasheet, Volume 1 of 2
Supporting Intel® Core™ Ultra Processor for U/H/U-Type4-series Platforms, formerly known as Meteor Lake
| ID | Date | Version | Classification |
|---|---|---|---|
| 792044 | 03/05/2024 | Public |
A newer version of this document is available. Customers should click here to go to the newest version.
Real Time Clock (RTC)
The
The real-time clock performs two key functions:
- Keep track of the time of day.
- Store system data even when the system is powered down as long as the RTC power well is powered.
The RTC also supports two lockable memory ranges. By setting bits in the configuration space, two 8-byte ranges can be locked to read and write accesses. This prevents unauthorized reading of passwords or other system security information.
The RTC also supports a date alarm that allows for scheduling a wake-up event up to month in advance.
| Acronyms | Description |
|---|---|
| BCD | Binary Coded Decimal |
| CMOS | Complementary Metal Oxide Semiconductor. A manufacturing process used to produce electronics circuits, but in reference to RTC is used interchangeably as the RTC’s RAM i.e. clearing CMOS meaning to clear RTC RAM. |
| ESR | Equivalent Series Resistance. Resistive element in a circuit such as a clock crystal. |
| GPI | General Purpose Input |
| PPM | Parts Per Million. Used to provide crystal accuracy or as a frequency variation indicator. |
| RAM | Random Access Memory |