Electronic Components Datasheet Search |
|
M29DW323DT70N1E Datasheet(PDF) 16 Page - Numonyx B.V |
|
M29DW323DT70N1E Datasheet(HTML) 16 Page - Numonyx B.V |
16 / 51 page M29DW323DT, M29DW323DB 16/51 Fast Program Commands There are two Fast Program commands available to improve the programming throughput, by writing several adjacent words or bytes in parallel. The Quadruple Byte Program command is available for x8 operations, while the Double Word Program command is available for x16 operations. Only one bank can be programmed at any one time. The other bank must be in Read mode or Erase Suspend. Fast Program commands should not be attempted when VPP/WP is not at VPP. Care must be taken because applying a 12V VPP voltage to the VPP/ WP pin will temporarily unprotect any protected block. After programming has started, Bus Read opera- tions in the Bank being programmed output the Status Register content, while Bus Read opera- tions to the other Bank output the contents of the memory array. After the program operation has completed the memory will return to the Read mode, unless an error has occurred. When an error occurs Bus Read operations to the Bank where the command was issued will continue to output the Status Reg- ister. A Read/Reset command must be issued to reset the error condition and return to Read mode. Note that the Fast Program commands cannot change a bit set at ’0’ back to ’1’. One of the Erase Commands must be used to set all the bits in a block or in the whole memory from ’0’ to ’1’. Typical Program times are given in Table 7., Program, Erase Times and Program, Erase Endurance Cycles. Quadruple Byte Program Command. The Qua- druple Byte Program command is used to write a page of four adjacent Bytes in parallel. The four bytes must differ only for addresses A0, DQ15A-1. Five bus write cycles are necessary to issue the Quadruple Byte Program command. ■ The first bus cycle sets up the Quadruple Byte Program Command. ■ The second bus cycle latches the Address and the Data of the first byte to be written. ■ The third bus cycle latches the Address and the Data of the second byte to be written. ■ The fourth bus cycle latches the Address and the Data of the third byte to be written. ■ The fifth bus cycle latches the Address and the Data of the fourth byte to be written and starts the Program/Erase Controller. Double Word Program Command. The Double Word Program command is used to write a page of two adjacent words in parallel. The two words must differ only for the address A0. Three bus write cycles are necessary to issue the Double Word Program command. ■ The first bus cycle sets up the Double Word Program Command. ■ The second bus cycle latches the Address and the Data of the first word to be written. ■ The third bus cycle latches the Address and the Data of the second word to be written and starts the Program/Erase Controller. Unlock Bypass Command The Unlock Bypass command is used in conjunc- tion with the Unlock Bypass Program command to program the memory faster than with the standard program commands. When the cycle time to the device is long, considerable time saving can be made by using these commands. Three Bus Write operations are required to issue the Unlock By- pass command. Once the Unlock Bypass command has been is- sued the bank enters Unlock Bypass mode. When in Unlock Bypass mode, only the Unlock Bypass Program and Unlock Bypass Reset commands are valid. The Unlock Bypass Program command can be issued to program addresses within the bank, and the Unlock Bypass Reset command to return the bank to Read mode. In Unlock Bypass mode the memory can be read as if in Read mode. When VPP is applied to the VPP/Write Protect pin the memory automatically enters the Unlock By- pass mode and the Unlock Bypass Program com- mand can be issued immediately. Care must be taken because applying a 12V VPP voltage to the VPP/WP pin will temporarily unprotect any protect- ed block. Unlock Bypass Program Command The Unlock Bypass Program command can be used to program one address in the memory array at a time. The command requires two Bus Write operations, the final write operation latches the ad- dress and data, and starts the Program/Erase Controller. The Program operation using the Unlock Bypass Program command behaves identically to the Pro- gram operation using the Program command. The operation cannot be aborted, a Bus Read opera- tion to the Bank where the command was issued outputs the Status Register. See the Program command for details on the behavior. Unlock Bypass Reset Command The Unlock Bypass Reset command can be used to return to Read/Reset mode from Unlock Bypass Mode. Two Bus Write operations are required to issue the Unlock Bypass Reset command. Read/ Reset command does not exit from Unlock Bypass Mode. |
Similar Part No. - M29DW323DT70N1E |
|
Similar Description - M29DW323DT70N1E |
|
|
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 |