Electronic Components Datasheet Search |
|
X28C512TI-20 Datasheet(PDF) 6 Page - Xicor Inc. |
|
X28C512TI-20 Datasheet(HTML) 6 Page - Xicor Inc. |
6 / 25 page 6 X28C512/X28C513 HARDWARE DATA PROTECTION The X28C512/513 provides three hardware features that protect nonvolatile data from inadvertent writes. • Noise Protection—A WE pulse typically less than 10ns will not initiate a write cycle. • Default VCC Sense—All write functions are inhibited when VCC is ≤3.6V. • Write Inhibit—Holding either OE LOW, WE HIGH, or CE HIGH will prevent an inadvertent write cycle during power-up and power-down, maintaining data integrity. Write cycle timing specifications must be observed concurrently. SOFTWARE DATA PROTECTION The X28C512/513 offers a software controlled data protection feature. The X28C512/513 is shipped from Xicor with the software data protection NOT ENABLED; that is, the device will be in the standard operating mode. In this mode data should be protected during power-up/ -down operations through the use of external circuits. The host would then have open read and write access of the device once VCC was stable. The X28C512/513 can be automatically protected dur- ing power-up and power-down without the need for external circuits by employing the software data protec- tion feature. The internal software data protection circuit is enabled after the first write operation utilizing the software algorithm. This circuit is nonvolatile and will remain set for the life of the device unless the reset command is issued. Once the software protection is enabled, the X28C512/ 513 is also protected from inadvertent and accidental writes in the powered-up state. That is, the software algorithm must be issued prior to writing additional data to the device. Note: The data in the three-byte enable sequence is not written to the memory array. SOFTWARE ALGORITHM Selecting the software data protection mode requires the host system to precede data write operations by a series of three write operations to three specific ad- dresses. Refer to Figure 4a and 4b for the sequence. The three byte sequence opens the page write window enabling the host to write from one to one hundred twenty-eight bytes of data. Once the page load cycle has been completed, the device will automatically be re- turned to the data protected state. |
Similar Part No. - X28C512TI-20 |
|
Similar Description - X28C512TI-20 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |