PARAMETER |
MIN |
TYP |
MAX |
UNIT |
Program Time(1) |
128 data bits + 16 ECC bits |
|
40 |
300 |
µs |
8KW sector |
|
90 |
180 |
ms |
Program Time(1) |
32KW sector |
|
360 |
720 |
ms |
EraseTime(2) at < 25 cycles |
8KW or 32KW sector |
|
30 |
55 |
ms |
EraseTime(2) at 1000 cycles |
8KW or 32KW sector |
|
40 |
350 |
ms |
EraseTime(2) at 2000 cycles |
8KW or 32KW sector |
|
50 |
600 |
ms |
EraseTime(2) at 20K cycles |
8KW or 32KW sector |
|
110 |
4000 |
ms |
Nwec Write/Erase Cycles per sector |
|
|
|
20000 |
cycles |
Nwec Write/Erase Cycles for entire Flash (combined all sectors)(3) |
|
|
|
100000 |
cycles |
tretention Data retention duration at TJ = 85oC |
|
20 |
|
|
years |
tretention Data retention duration at TJ = 125oC(4) |
|
10 |
|
|
years |
(1) Program time is at the maximum device frequency. Program time includes overhead of the flash state machine but does not include the time to transfer the following into RAM:
• Code that uses flash API to program the flash
• Flash API itself
• Flash data to be programmed
In other words, the time indicated in this table is applicable after all the required code/data is available in the device RAM, ready for
programming. The transfer time will significantly vary depending on the speed of the emulator used.
Program time calculation is based on programming 144 bits at a time at the specified operating frequency. Program time includes
Program verify by the CPU. The program time does not degrade with write/erase (W/E) cycling, but the erase time does.
Erase time includes Erase verify by the CPU and does not involve any data transfer.
(2) Erase time includes Erase verify by the CPU.
(3) Each sector, by itself, can only be erased/programmed 20,000 times. If you choose to use a sector (or multiple sectors) like an EEPROM, you can erase/program only those sectors (still limited to 20,000 cycles) without erasing/programming the entire Flash memory. Therefore, the total number of W/E cycles from a device perspective can exceed 20,000 cycles. However, even this number should not exceed 100,000 cycles.