 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
MX29F002NBTC-90 Datasheet(PDF) 7 Page - Macronix International |
|
||||||||||||||||||||||||||||||
MX29F002NBTC-90 Datasheet(HTML) 7 Page - Macronix International |
|
|
7 / 51 page  7 REV. 1.5, MAR. 28, 2005 P/N: PM0547 MX29F002/002N T/B READ/RESET COMMAND The read or reset operation is initiated by writing the read/ reset command sequence into the command register. Microprocessor read cycles retrieve array data. The device remains enabled for reads until the command register contents are altered. If program-fail or erase-fail happen, the write of F0H will reset the device to abort the operation. A valid command must then be written to place the device in the desired state. SILICON-ID-READ COMMAND Flash memories are intended for use in applications where the local CPU alters memory contents. As such, manufacturer and device codes must be accessible while thedeviceresidesinthetargetsystem. PROMprogrammers typically access signature codes by raising A9 to a high voltage. However, multiplexing high voltage onto address lines is not generally desired system design practice. The MX29F002T/B contains a Silicon-ID-Read operation tosupplementtraditionalPROMprogrammingmethodology. The operation is initiated by writing the read silicon ID command sequence into the command register. Following the command write, a read cycle with A1=VIL, A0=VIL retrieves the manufacturer code of C2H. A read cycle with A1=VIL, A0=VIH returns the device code of B0h for MX29F002T, 34h for MX29F002B. Pins A0 A1 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 Code(Hex) Code Manufacture code VIL VIL 1100 0010 C2H Device code VIH VIL 1011 0000 B0h for MX29F002T Device code VIH VIL 0011 0100 34h for MX29F002B Sector Protection X VIH 0000 0001 01H (Protected) Verification X VIH 0000 0000 00H (Unprotected) TABLE 3. EXPANDED SILICON ID CODE SET-UP AUTOMATIC CHIP/SECTOR ERASE COMMANDS Chip erase is a six-bus cycle operation. There are two "unlock" write cycles. These are followed by writing the "set-up" command 80H. Two more "unlock" write cycles are then followed by the chip erase command 10H. The Automatic Chip Erase does not require the device to be entirely pre-programmed prior to executing the Automatic Chip Erase. Upon executing the Automatic Chip Erase, the device will automatically program and verify the entire memory for an all-zero data pattern. When the device is automatically verified to contain an all-zero pattern, a self- timed chip erase and verify begin. The erase and verify operations are completed when the data on Q7 is "1" at which time the device returns to the Read mode. The system is not required to provide any control or timing during these operations. When using the Automatic Chip Erase algorithm, note that the erase automatically terminates when adequate erase margin has been achieved for the memory array(no erase verify command is required). If the Erase operation was unsuccessful, the data on Q5 is "1" (see Table 4), indicating the erase operation exceed internal timing limit. The automatic erase begins on the rising edge of the last WE pulse in the command sequence and terminates when the data on Q7 is "1" and the data on Q6 stops toggling for two consecutive read cycles, at which time the device returns to the Read mode. |
Similar Part No. - MX29F002NBTC-90 |
|
Similar Description - MX29F002NBTC-90 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | 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
