Xerox® Security Guide for Entry Production Color Class Products
March 2019
Page 7-33
User image data not
stored.
customer
alterable.
512KB
Battery-
backed SRAM
(ESS PWBA)
Configuration and
control set points.
User image data not
stored.
N
SRAM is not
erased when a
main switch is
turned off. Not
customer
alterable.
No
512KB
EEPROM
Permanent storage
of machine setting
data. User image
data not stored.
N
Not customer
alterable.
No
Additional Information: All memory listed above contains code for execution and configuration
information. No user or job data is stored in these locations.
Controller Volatile Memory
Size
Type
Use
User
Modifiable
How to
Clear
Volatile
64MB
SDRAM
(MCU
PWBA)
Temporary
storage
of variables
N
SRAM is
erased
when machine
is
powered off.
Yes
4Gbit
DRAM
(SYSTEM
MEMORY
DIMM)
Temporary
storage
of program and
work area
N
SDRAM is
erased
when machine
is
powered off.
Yes
64MB
SDRAM
(ESS
PWBA)
Temporary
storage
of program and
work area
N
SDRAM is
erased
when machine
is
powered off.
Yes
1Gbit
SDRAM
(page
memory)
Temporary
storage
of variables
N
SRAM is
erased
when machine
is
powered off.
Yes
512MB
1Gbit
(64M x
16 bit) x4
SDRAM
(page
memory)
DIMM:
IPS
PWBA
Temporary
storage
of variables for
IISS
N
SRAM is
erased
when machine
is
powered off.
Yes
Additional Information: The controller operating system memory manager
allocates memory dynamically between OS, running processes, and temporary
data which includes jobs in process. When a job is complete, the memory pages
in use are freed and reallocated as required by the OS.
