Electronic Components Datasheet Search |
|
X20C17 Datasheet(PDF) 3 Page - Xicor Inc. |
|
|
X20C17 Datasheet(HTML) 3 Page - Xicor Inc. |
3 / 11 page X20C17 3 DEVICE OPERATION The CE, OE, and WE inputs control the X20C17 opera- tion. The X20C17 byte-wide NOVRAM uses a 2-line control architecture to eliminate bus contention in a system environment. The I/O bus will be in a high impedance state when either OE or CE is HIGH. RAM Operations RAM read and write operations are performed as they would be with any static RAM. A read operation requires CE and OE to be LOW. A write operation requires CE and WE to be LOW. There is no limit to the number of read or write operations performed to the RAM portion of the X20C17. Memory Transfer Operations There are two memory transfer operations: a recall operation whereby the data stored in the E2PROM array is transferred to the RAM array; and a store operation which causes the entire contents of the RAM array to be stored in the E2PROM array. Recall operations are performed automatically upon power-up. Store operations are performed automatically upon power-down. The store operation take a maximum of 2.5ms. Write Protection The X20C17 supports two methods of protecting the nonvolatile data. —If after power-up no RAM write operations have occured, no AUTOSTORE operation can be initiated. —VCC Sense – All functions are inhibited when VCC is ≤ 3V typical. SYMBOL TABLE The following symbol table provides a key to under- standing the conventions used in the device timing diagrams. The diagrams should be used in conjunction with the device timing specifications to determine actual device operation and performance, as well as device suitability for user’s application. WAVEFORM INPUTS OUTPUTS Must be steady Will be steady May change from LOW to HIGH Will change from LOW to HIGH May change from HIGH to LOW Will change from HIGH to LOW Don’t Care: Changes Allowed Changing: State Not Known N/A Center Line is High Impedance |
Similar Part No. - X20C17 |
|
Similar Description - X20C17 |
|
|
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 |