12th Generation Intel® Core™ Processors Datasheet, Volume 1 of 2
Date 28/10/2021 00:00:00
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Security Technologies Intel® Trusted Execution Technology Intel® Advanced Encryption Standard New Instructions Perform Carry-Less Multiplication Quad Word Instruction Intel® Secure Key Execute Disable Bit Boot Guard Technology Intel® Supervisor Mode Execution Protection Intel® Supervisor Mode Access Protection Intel® Secure Hash Algorithm Extensions User Mode Instruction Prevention Read Processor ID Intel® Multi-Key Total Memory Encryption Intel® Control-flow Enforcement Technology KeyLocker Technology Devil’s Gate Rock
Power and Performance Technologies Intel® Smart Cache Technology IA Cores Level 1 and Level 2 Caches Ring Interconnect Intel® Hybrid Technology Intel® Turbo Boost Max Technology 3.0 Intel® Hyper-Threading Technology Intel® Turbo Boost Technology 2.0 Enhanced Intel SpeedStep® Technology Intel® Thermal Velocity Boost (Intel® TVB) Intel® Speed Shift Technology Intel® Advanced Vector Extensions 2 (Intel® AVX2) Intel® 64 Architecture x2APIC Intel® Dynamic Tuning Technology Intel® GMM and Neural Network Accelerator Cache Line Write Back Remote Action Request User Mode Wait Instructions
Power Management Advanced Configuration and Power Interface (ACPI) States Supported Processor IA Core Power Management Processor AUX Power Management Processor Graphics Power Management System Agent Enhanced Intel SpeedStep® Technology Rest Of Platform (ROP) PMIC PCI Express* Power Management TCSS Power State
Thermal Management Features Adaptive Thermal Monitor Digital Thermal Sensor PROCHOT# Signal PROCHOT Output Only Bi-Directional PROCHOT# PROCHOT Demotion Algorithm Voltage Regulator Protection using PROCHOT# Thermal Solution Design and PROCHOT# Behavior Low-Power States and PROCHOT# Behavior THRMTRIP# Signal Critical Temperature Detection On-Demand Mode MSR Based On-Demand Mode I/O Emulation-Based On-Demand Mode
System Memory Interface Processor SKU Support Matrix Supported Memory Modules and Devices System Memory Timing Support Memory Controller (MC) Memory Controller Power Gate System Memory Controller Organization Mode (DDR4/5 Only) System Memory Frequency Technology Enhancements of Intel® Fast Memory Access (Intel® FMA) Data Scrambling Data Swapping DDR I/O Interleaving DRAM Clock Generation DRAM Reference Voltage Generation Data Swizzling Error Correction With Standard RAM Post Package Repair (PPR)
Signal Description System Memory Interface PCI Express* Graphics (PEG) Signals Direct Media Interface (DMI) Signals Reset and Miscellaneous Signals Display Interfaces Processor Clocking Signals Testability Signals Error and Thermal Protection Signals Power Sequencing Signals Processor Power Rails Ground and Reserved Signals Processor Internal Pull-Up / Pull-Down Terminations
Initialization Role of CKE
During power-up, CKE is the only input to the SDRAM that has its level recognized (other than the reset pin) once power is applied. It should be driven LOW by the DDR controller to make sure the SDRAM components float DQ and DQS during power-up. CKE signals remain LOW (while any reset is active) until the BIOS writes to a configuration register. Using this method, CKE is ensured to remain inactive for much longer than the specified 200 micro-seconds after power and clocks to SDRAM devices are stable.