Reference Guide

01/2020
How is this memory write
protected?
Hardware and software write protected
System Flash ROM
WINBOND W25X40CLNIG
Size
4Mbit
Type [e.g. Flash PROM,
EEPROM]
Serial flash memory
Volatility
Non-volatile
Can user programs or
operating system write data to
it during normal operation?
No
Purpose To store firmware
How is data input to this
memory?
Loading flash memory requires a vendor-provided
tool and firmware
How is this memory write
protected?
Software write protected
CAUTION: All other components on the system board lose data if power is removed from the system.
Primary power loss (unplugging the power cord) destroys all user data
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