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
What is the
Purpose?
(e.g. boot
code)
How is data
written to
this
memory?
How is memory
write- protected?
How is
memory
cleared?
H745P MX
NVSRAM
Non
-volatile
1
U1087
1Mb
NVSRAM
No
Configuration
data
ROC writes
configuration
data to NVSRAM
N
o write protect
Not visible to Host
Processor
Not
user clearable
FRU
Non
-volatile
1
U1019
64Kb
FRU
No
Card
manufacturing
informati
on
Programmed at
ICT during
production.
N
o write protect
Not
user clearable
1
-Wire EEPROM
Non
-volatile
1
U1004
1Kb
1
-Wire EEPROM No
Holds default
controller
properties/settin
gs
ROC writes data
to this memory
No write protect
Not visible to
Host
Processor
Not
user clearable
Serial Boot ROM
Non
-volatile
1
U1020
4KB
Serial Boot ROM
No
Bootloader
Pre-
programmed
before assembly
No write protect
Not visible to Host
Processor
Not
user clearable
SPD
Non
-volatile
1
U22
2Kb
SPD
No
Memory
configuration
data
Pre-
programmed
before assembly
No write protect
Not visible to Host
Processor
Not
user clearable