 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
X28HC64DM-90 Datasheet(PDF) 6 Page - Intersil Corporation |
|
||||||||||||||||||||||||||||||
X28HC64DM-90 Datasheet(HTML) 6 Page - Intersil Corporation |
|
|
6 / 16 page  6 FN8109.0 June 1, 2005 HARDWARE DATA PROTECTION The X28HC64 provides two hardware features that protect nonvolatile data from inadvertent writes. – Default VCC Sense—All write functions are inhibited when VCC is 3V typically. – Write Inhibit—Holding either OE LOW, WE HIGH, or CE HIGH will prevent an inadvertent write cycle dur- ing power-up and power-down, maintaining data integrity. SOFTWARE DATA PROTECTION The X28HC64 offers a software controlled data pro- tection feature. The X28HC64 is shipped from Intersil 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 cir- cuits. The host would then have open read and write access of the device once VCC was stable. The X28HC64 can be automatically protected during power-up and power-down without the need for exter- nal circuits by employing the software data protection feature. The internal software data protection circuit is enabled after the first write operation utilizing the soft- ware 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 X28HC64 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. 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 addresses. Refer to Figure 6 and 7 for the sequence. The three-byte sequence opens the page write window, enabling the host to write from one to sixty-four bytes of data. Once the page load cycle has been com- pleted, the device will automatically be returned to the data protected state. X28HC64 |
Similar Part No. - X28HC64DM-90 |
|
Similar Description - X28HC64DM-90 |
|
|
|
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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
