 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
IS23SC1604-P Datasheet(PDF) 4 Page - Integrated Silicon Solution, Inc |
|
||||||||||||||||||||||||||||||
IS23SC1604-P Datasheet(HTML) 4 Page - Integrated Silicon Solution, Inc |
|
|
4 / 18 page  4 Integrated Silicon Solution, Inc. — 1-800-379-4774 ADVANCEINFORMATION Rev. 00E 04/10/03 IS23SC1604 ISSI® IS23SC1604 OPERATIONS Power-On Reset (POR) When the supply voltage is first applied to the device, the device initiates POR. All the internal flags are clear (refer to Definition of IS23SC1604 Internal Flags), and the internal address counter is reset to zero. Reset With CLK LOW, a HIGH-to-LOW transition at RST resets the address counter to zero. After the falling edge of RST, the device outputs the first bit of the memory on I/O pin. The reset operation will have no effect on any internal flags (see AC Test Load). Addressing Addressing is handled by an internal address counter which is incremented on the falling edge of CLK. When the counter continues to increment past 16383, the counter will roll over back to zero. The counter can also be cleared to zero by the reset operation. Read If read access to a memory bit is enabled, the state of the bit can be read out of the device by incrementing the address counter to the bit location. The device outputs the state of the read bit on the I/O pin after the falling edge of the last clock pulse that increments the address counter to the read bit location. However, if the read access to the memory bit is inhibited, the state of the data bit will not be output and the I/O pin will be placed in high-impedance state ‘1’ (see Reset Timing Diagram). Compare Compare operation allows users to input the security/ erase key code for the security/erase key code valida- tion for read/write/erase access to protected application zones (refer to Security/Erase Key Code Validation Operation). The compare operation latches the user’s input Security/ Erase Key bit into the device at the rising edge of CLK and the bit comparison is performed on the next falling edge of CLK. The compare and read operations are executed in the same manner. The device distinguishes between the two operations by testing the address counter for security/erase key code location and the state of corresponding security/erase key code valid comparison flag (see Read Timing Diagram). Write If write access to a memory bit is enabled, the content of the bit can be written over with a ‘0’ value by perform- ing the following sequence: select PGM (logic HIGH state), input ‘0’ on the I/O pin, change CLK from LOW- to-HIGH, deselect PGM (logic LOW state), wait for 5 ms programming delay, and then bring CLK down from HIGH-to-LOW to complete the write operation. The new state of the bit will be output at the end of the write operation after the falling edge of CLK for data verifica- tion (see Compare Timing Diagram). Erase If erase access to a memory bit is enabled, the content of the bit can be written over with a ‘1’ value with the erase operation. Although erase is performed on single bits, the erase operation writes FFH to the whole byte which contains the erased bits because the memory is organized into 8-bit bytes. The erase operation can be executed by performing the following sequence: select PGM (logic HIGH state), input ‘1’ on the I/O pin, change CLK from LOW-to-HIGH, deselect PGM (logic LOW state), wait for 5 msec programming delay, and then bring CLK down from HIGH-to-LOW to complete the erase operation. The new state of the bit will be output at the end of the erase operation after the falling edge of CLK for data verification (see Compare Timing Dia- gram). |
Similar Part No. - IS23SC1604-P |
|
Similar Description - IS23SC1604-P |
|
|
|
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
