Reference Guide

Item
Type (e.g. Flash PROM,
EEPROM)
Can user programs or
operating system write
data to it during normal
operation?
Purpose? (e.g. boot code)
Planar
CPU Internal CMOS RAM
Battery-backed CMOS RAM
No
Real-time clock
BIOS SPI Flash
SPI Flash
Yes
System BIOS Boot code
DATA ROM
SPI Flash
Yes
BIOS backup data
iDRAC SPI Flash
SPI Flash
No
iDRAC Uboot (bootloader)
BMC EMMC
eMMC NAND Flash
Yes
iDRAC Kernel FW
Memory VDDQ, CPU Vcore
NVM
No
VR Setting
System CPLD RAM
RAM
No
CPLD code
System Memory
RAM
Yes
System host RAM
Risers 1A
MCU
Flash PROM
Yes
Riser FW
SD SPI ROM
SPI Flash
Yes
SD FW
RSPI ROM
SPI Flash
No
SPI flash device to store information
about the system Service Tag, system
configuration, or iDRAC license.
Risers 1B
MCU
Flash PROM
Yes
Riser FW
RSPI ROM
SPI Flash
No
SPI flash device to store information
about the system Service Tag, system
configuration, or iDRAC license.
Risers 2A
MCU
Flash PROM
Yes
Riser FW
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