 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
AT88SC1003-09ET-00 Datasheet(PDF) 9 Page - ATMEL Corporation |
|
||||||||||||||||||||||||||||||
AT88SC1003-09ET-00 Datasheet(HTML) 9 Page - ATMEL Corporation |
|
|
9 / 30 page  9 AT88SC1003 2035B–SMEM–08/03 Internal Flags Table 4. Definition of AT88SC1003 Internal Flags Flag Definition Operation Function SV Security Validation Flag The SV flag is set by correctly matching the 16-bit security code bit by bit from address 80 through 95, as pin CLK increments the address counter. The security code matching operation must be followed immediately by a validation operation within the Security Code Attempts Counter (SCAC). This validation operation requires the user to find a bit in the SCAC, addresses 96–99, that is a logic “1”. A write is performed followed by an erase. The AT88SC1003 will validate that the comparison was correct by outputting a logic “1”, and SV will be set. After the erase, all 16 bits in the SCAC will also be erased. The flag remains set until power to the card is turned off. If the comparison was in error or part of the validation was not performed correctly, the AT88SC1003 will output a logic “0” showing that SV has not been set. After four consecutive incorrect security code presentations, the card is permanently locked. This flag is the master protection for the memory zones. See Table 6 and Table 7. P1 Application Zone 1 Write Flag If Bit 176 has been programmed to a logic “1”, this flag is set after Bit 176 has been addressed. The flag remains set until power to the device is turned off, even if this bit is written to “0” by a subsequent operation. P1 and SV must both be set in order to enable a write command in Application Zone 1 (Security Mode 2). P2 Application Zone 2 Write Flag If Bit 480 has been programmed to a logic “1”, this flag is set after Bit 480 has been addressed. The flag remains set until power to the device is turned off, even if this bit is written to “0” by a subsequent operation. P2 and SV must both be set in order to enable the write command in Application Zone 2 (Security Mode 2). P3 Application Zone 3 Write Flag If Bit 1024 has been programmed to a logic “1”, this flag is set after Bit 1024 has been addressed. The flag remains set until power to the device is turned off, even if this bit is written to “0” by a subsequent operation. P3 and SV must both be set in order to enable a write command in Application Zone 3 (Security Mode 2). R1 Application Zone 1 Read Flag If Bit 177 has been programmed to a logic “1”, this flag is set after Bit 177 has been addressed. The flag remains set until power to the device is turned off, even if this bit is written to “0” by a subsequent operation. R1 or SV must be set to “1” in order to enable Application Zone 1 bits to be read. R2 Application Zone 2 read flag If Bit 481 has been programmed to a logic “1”, this flag is set after Bit 481 has been addressed. The flag remains set until power to the device is turned off, even if this bit is written to “0” by a subsequent operation. R2 or SV must be set to “1” in order to enable Application Zone 2 bits to be read. R3 Application Zone 3 Read Flag If Bit 1025 has been programmed to a logic “1”, this flag is set after Bit 1025 has been addressed. The flag remains set until power to the device is turned off, even if this bit is written to “0” by a subsequent operation. R3 or SV must be set to “1” in order to enable Application Zone 3 bits to be read. |
Similar Part No. - AT88SC1003-09ET-00 |
|
Similar Description - AT88SC1003-09ET-00 |
|
|
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
