SST49LF020A 데이터 시트보기 (PDF) - Silicon Storage Technology

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SST49LF020A

2 Mbit LPC Flash

Silicon Storage Technology 

2 Mbit LPC Flash

SST49LF020A

Data Protection (PP Mode)

The SST49LF020A devices provide both hardware and

software features to protect nonvolatile data from inadvert-

ent writes.

Hardware Data Protection

Noise/Glitch Protection: A WE# pulse of less than 5 ns will

not initiate a Write cycle.

VDD Power Up/Down Detection: The Write operation is

inhibited when VDD is less than 1.5V.

Write Inhibit Mode: Forcing OE# low, WE# high will inhibit

the Write operation. This prevents inadvertent writes during

power-up or power-down.

Data Sheet

Software Data Protection (SDP)

The SST49LF020A provide the JEDEC approved Software

Data Protection scheme for all data alteration operation,

i.e., Program and Erase. Any Program operation requires

the inclusion of a series of three-byte sequence. The three-

byte load sequence is used to initiate the Program opera-

tion, providing optimal protection from inadvertent Write

operations, e.g., during the system power-up or power-

down. Any Erase operation requires the inclusion of a six-

byte load sequence.

©2006 Silicon Storage Technology, Inc.

19

S71206-08-000

5/06

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