 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
AM29SL400CB120EC Datasheet(PDF) 23 Page - Advanced Micro Devices |
|
||||||||||||||||||||||||||||||
AM29SL400CB120EC Datasheet(HTML) 23 Page - Advanced Micro Devices |
|
|
23 / 44 page  January 23, 2007 Am29SL400C_00_A6 Am29SL400C 21 D A TA SH EE T DQ5: Exceeded Timing Limits DQ5 indicates whether the program or erase time has ex- ceeded a specified internal pulse count limit. Under these conditions DQ5 produces a 1. This is a failure condition that indicates the program or erase cycle was not successfully completed. The DQ5 failure condition may appear if the system tries to program a 1 to a location that is previously programmed to “0.” Only an erase operation can change a 0 back to a 1. Under this condition, the device halts the operation, and when the operation has exceeded the timing limits, DQ5 pro- duces a 1. Under both these conditions, the system must issue the reset command to return the device to reading array data. DQ3: Sector Erase Timer After writing a sector erase command sequence, the system may read DQ3 to determine whether or not an erase opera- tion has begun. (The sector erase timer does not apply to the chip erase command.) If additional sectors are selected for erasure, the entire time-out also applies after each addi- tional sector erase command. When the time-out is com- plete, DQ3 switches from 0 to 1. If the time between additional sector erase commands from the system can be assumed to be less than 50 µs, the system need not monitor DQ3. See also Sector Erase Command Sequence‚ on page 16. After the sector erase command sequence is written, the system should read the status on DQ7 (Data# Polling) or DQ6 (Toggle Bit I) to ensure the device has accepted the command sequence, and then read DQ3. If DQ3 is 1, the in- ternally controlled erase cycle has begun; all further com- mands (other than Erase Suspend) are ignored until the erase operation is complete. If DQ3 is 1, the device will ac- cept additional sector erase commands. To ensure the com- mand has been accepted, the system software should check the status of DQ3 prior to and following each subsequent sector erase command. If DQ3 is high on the second status check, the last command might not have been accepted. Table 6 on page 22 shows the outputs for DQ3. START No Yes Yes DQ5 = 1? No Yes Toggle Bit = Toggle? No Program/Erase Operation Not Complete, Write Reset Command Program/Erase Operation Complete Read DQ7–DQ0 Toggle Bit = Toggle? Read DQ7–DQ0 Twice Read DQ7–DQ0 Notes: 1. Read toggle bit twice to determine whether or not it is toggling. See text. 2. Recheck toggle bit because it may stop toggling as DQ5 changes to 1. See text. Figure 6. Toggle Bit Algorithm (Notes 1, 2) (Note 1) |
Similar Part No. - AM29SL400CB120EC |
|
Similar Description - AM29SL400CB120EC |
|
|
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
