XEROX WorkCentre 7755/7765/7775 Information Assurance Disclosure Paper
6
Ver. 1.01, April 2010
Page
6 of 40
Security Function
Subsystem
Security Management
Controller
Graphical User Interface
Table 1 Security Functions allocated to Subsystems
2.2.
Controller
The Copy Controller and the Network Controller are the two main software components of the controller subsystem.
Both components reside on the single controller board. The copy controller software and network controller software
execute on a common processor within separate and unshared memory spaces and communicate with RPC calls.
A single disk is used with partitions assigned to the network controller and copy controller.
The UI software runs on the single-board controller in the Single-Board Controller (SBC) configuration.
2.2.1.
Copy Controller Software (CC)
2.2.1.1.
Purpose
The Copy Controller provides all of the functions necessary to implement a digital copier, and works together with the
Fax card to implement embedded fax functionality. The Copy Controller contains the image path, which uses
proprietary hardware and algorithms to process the scanned images into high-quality reproductions. Among other
common copier functions, the CC works with the EPC DRAM to enable electronic pre-collation, sometimes referred to
as scan-once/print-many. When producing multiple copies of a document, the scanned image is processed and
buffered in the EPC DRAM in a proprietary format. Extended buffer space for very large documents is in the CC
partition of the single system disk in the SBC configuration. The buffered bitmaps are then read from EPC DRAM
and sent to the Image Output Terminal (IOT) for marking on hardcopy output. For long documents, the production
of hardcopy may begin before the entire original is scanned, achieving a level of concurrency between the scan and
mark operations.
The Copy Controller works with the Graphical User Interface (GUI) assembly to provide System Configuration
functions. A System Administrator PIN must be entered at the GUI in order to access these functions.
2.2.1.2.
Memory Components
Volatile Memory Description
Type (SRAM, DRAM, etc)
Size
User Modifiable
(Y/N)
Function or Use
Process to
Clear:
DDR2 SDRAM
2GB
N
Processor Memory space, No user
image data stored
Power Off System
DDR SDRAM
1GB
N
EPC Memory user data store
Power Off System
DDR2 SDRAM
64MB
N
Dedicated DUI frame buffer
Power Off System
Additional Information:
Scan to Remote File is supported on this device
Non-Volatile Memory Description
Type (Flash, EEPROM, etc) Size
User Modifiable
(Y/N)
Function or Use
Process to
Clear:
