White Papers

May 2020
Statement of Volatility – Dell P2421 Monitor
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you
how to avoid the problem.
The purpose of this document is to certify that Dell’s P2421 monitor will not save, retain or reproduce a signal to any internal or external
component after power has been removed and reapplied to the unit.
The Dell P2421 monitor contains both volatile and non-volatile (NV) memory ICs. Volatile memory(s) lose their data immediately upon
removal of power. Non-volatile memory ICs continue to retain their data even after the power has been removed. However, no input video
data is written into these memory ICs during operation.
List below contains volatile and non volatile memory ICs used in Dell P2421 monitor.
System EEPROM ST M24C16
Size 16Kbit
Type [e.g. Flash PROM, EEPROM] EEPROM
Volatility Non-volatile
Can user programs or operating
system write data to it during normal
operation?
OSD setting: Yes
Purpose Storage of system setting (OSD)
How is data input to this memory?
Control the OSD menu and change OSD setting (ex. Brightness,
contrast, color setting) and the setting will be stored into system
EEPROM
How is this memory write protected? Software write protected
VGA EDID EEPROM ST M24C02
Size 2Kbit
Type [e.g. Flash PROM, EEPROM] EEPROM
Volatility Non-volatile
Can user programs or operating
system write data to it during normal
operation?
No
Purpose Storage of VGA EDID
How is data input to this memory?
VGA EDID is embedded in the firmware, and copied to EEPROM
after F/W programming.
(or via customized EDID tool)
How is this memory write protected? Hardware and software write protected