Reference Guide

Internal Use - Confidential
Item
Non-
Volatile or
Volatile
Quantity
Reference
Designator
Size of
memory
Type of
memory
(e.g. Flash
PROM,
EEPROM)
Can user programs
or operating
system write data
to it during normal
operation?
What is the
Purpose?
(e.g. boot
code)
How is data
written to
this
memory?
How is
memory write
protected?
How is memory
cleared?
Planar
CPU Vcore
Regulators
Non-Volatile
2
U8003,
U8043
16 KB
ROM
No
Operational
parameters
Programmed
at factory via
I2C
No write protect
Not user clearable
Vmem
Regulators
Non-Volatile
2
U8011,
U8051
16 KB
ROM
No
Operational
parameters
Programmed
at factory via
I2C
No write protect
Not user clearable
System CPLD
RAM
Volatile
1
U_CPLD
92Kb
FLASH
No
Not utilized
Not utilized
Not accessible
Not accessible
System CPLD
FLASH
Non-Volatile
1
U_CPLD
256Kb
RAM
No
Power on
System
Firmware
Firmware
update
BIOS Security
Protocols
Not user clearable
System
Memory:
RDIMM and
LRDIMM
Volatile
Up to 12
per CPU
CPU<2:1>_C
H<5:0>_D<1:
0>
Up to 128GB
per DIMM
DRAM
Yes
System OS
RAM
System OS
OS Control
Reboot or power down
system
System
Memory:
NVDIMMM-N
Non-Volatile
Up to 6
per CPUs
1 and 2
(12 total in
system)
CPU<2:1>_C
H<5:0>_D1
16GB per
NVDIMM-N
DRAM
runtime
(volatile)
saved to
NAND flash
(non-
volatile) on
shutdown
Yes
OS addressable
memory that will
persist over
shutdown that is
accessible at
DDR speed
When system
initiates a Save
(AC loss,
shutdown,
etc.),
NVDIMM-N
controller will
transfer data
from DRAM to
Flash
"OS can prevent
writes to
DRAM/DDR at
runtime in
response to NFIT
table.
OS addressable
memory that will persist
over shutdown that is
accessible at DDR
speed