31.27 NVM Block (Flash, Data Flash, NVM Configuration Rows) Electrical Specifications

Table 31-37. Flash NVM AC Electrical Specifications
AC CHARACTERISTICSStandard Operating Conditions: VDDIO = AVDD = VDD 1.62V to 3.63V (unless otherwise stated)

Operating temperature:

-40°C ≤ TA ≤ +85°C for Industrial

Param. No.SymbolCharacteristicsMin.Typ.Max.UnitsConditions
NVM_1FRETENFlash Data Retention20YrsUnder all conditions less than Absolute Maximum Ratings specifications
NVM_3EPCell Endurance (Flash Erase and Write Operation)25000Cycles
NVM_5FREADFlash Read0 Wait States14MHzVDD = 1.62V to 2.7V
1 Wait States28
2 Wait States42
3 Wait States48
0 Wait States24MHzVDD = 2.7V to 3.63V
1 Wait States48
NVM_7TFPWProgram Cycle Time Write Page (2)2.5ms VDD = 3.3V
NVM_9TCEErase Chip240ms
NVM_11TFERErase Row6ms
Note:
  1. Maximum Flash operating frequencies are given in the table above, but are limited by the Embedded Flash access time when the processor is fetching code out of it. Theses tables provide the device maximum operating frequency defined by the field RWS of the NVMCTRL CTRLA register. This field defines the number of Wait states required to access the Embedded Flash Memory.
  2. For this Flash technology, a maximum number of 8 consecutive writes is allowed per row. Once this number is reached, a row erase is mandatory.