Reference Guide

Internal Use - Confidential
Item
How is data input to this memory?
How is this memory write protected?
Planar
CPU Internal CMOS RAM
BIOS
N/A – BIOS only control
BIOS SPI Flash
SPI interface via iDRAC
Software write protected
iDRAC SPI Flash
SPI interface via iDRAC
Embedded iDRAC subsystem firmware
actively controls sub area based write
protection as needed.
BMC EMMC
NAND Flash interface via iDRAC
Embedded FW write protected
Memory VDDQ, CPU Vcore
and VSA Regulators
Once values are loaded into register
space a cmd writes to nvm.
There are passwords for different sections of
the register space
System CPLD RAM
Not utilized
Not accessible
System Memory
System OS RAM
System OS
System Memory
System OS
OS Control
Power Supplies
PSU FW
Different vendors have different
utilities and tools to load the data to
memory. It can also be loaded by
Dell Update Package from LC or OS
(Windows and Linux)
Protected by the embedded microcontroller.
Special keys are used by special vendor
provided utilities to unlock the ROM with
various CRC checks during load.
NOTE: For any information that you may need, direct your questions to your Dell Marketing contact.
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05 - 2021
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