44.18 Flash NVM Electrical Specifications

Table 44-21. Flash NVM AC Electrical Specifications
AC CHARACTERISTICS				Standard Operating Conditions: VDD & VDDIO 2.7V to 5.5V (unless otherwise stated) Operating temperature -40°C ≤ TA ≤ +125°C for Extended Temp
Param. No.	Symbol	Characteristics		Min.	Typical	Max.	Units	Conditions
NVM_1	FRETEN	Flash Data Retention		15	—	—	Yrs	Under all conditions less than Absolute Maximum Ratings specifications
NVM_3	EP	Cell Endurance (Flash Erase and Write Operation)		25000	—	—	Cycles
NVM_5	FREAD	Flash Read	0 Wait States	—	—	21	MHz	VDDIO = 5.0V
			1 Wait States	—	—	42
			2 Wait States	—	—	48
			0 Wait States	—	—	20	MHz	VDDIO = 3.3V
			1 Wait States	—	—	41
			2 Wait States	—	—	48
Note: 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 NVM_CTRL CTRLA register. This field defines the number of Wait states required to access the Embedded Flash Memory.