WorkCentre 7220-7225 Information Assurance Disclosure Paper
Ver. 1.0, January 2013
Page
10 of 61
2.2.2.
Memory Components
Volatile Memory Description
Type (SRAM, DRAM, etc)
Size
User Modifiable
(Y/N)
Function or Use
Process to Clear:
DDR3 SDRAM non ECC –
System Memory
2GB
N
Executable code, Printer control
data, temporary storage of job
data
Power Off System
DDR2 SDRAM non ECC –
Image Memory
1GB
N
Image data - copy/scan/print/Fax
Power Off System
DDR2 SDRAM non ECC – Page
Buffer
512MB
N
Scan image page buffer
Power Off System
SRAM
1MB
N
JPEG image processing buffer
Power Off System
Additional Information:
There are two main blocks of Volatile memory in the controller, System and Image memory. System memory contains a
mixture of executable code, control data and job data. Job data exists in System memory while the job is being processed.
Once the job is complete the memory is reused for the next job. Likewise Image memory holds job data in a proprietary
format while the job is being processed. Once the job is complete the image memory is reused for subsequent jobs.
Non-Volatile Memory Description
Type (Flash, EEPROM,
etc)
Size
User
Modifiable
(Y/N)
Function or Use
Process to Clear:
SD CARD
4GB
via Diagnostics
Control set points, configuration
settings, Boot Memory
Diagnostic
EEPROM
1Mb
Via Diagnostics
Programs Taurus ASIC
Diagnostic
Flash
38KB
Via Diagnostic
Boot sector for power manager,
MAC address
Diagnostic
Battery Backed SRAM
6kB
Via Diagnostic
Power manager variables
Diagnostic
EEPROM
1Mb
Via Diagnostics
Programs Taurus ASIC
Diagnostic
Additional Information:
All memory listed above contains code for execution and configuration information. No user or job data is stored in these
locations.
Table 2 Controller volatile and non-volatile memory components