ATXMEGA128A4U-AU Datasheet, PDF (74/121 Pages) ATMEL Corporation – 8/16-bit Atmel XMEGA A4U Microcontroller

XMEGA A4U
35.13 Flash and EEPROM Memory Characteristics
Table 35-13. Endurance and Data Retention
Symbol Parameter
Condition
Flash
Write/Erase cycles
Data retention
EEPROM
Write/Erase cycles
Data retention
25°C
85°C
25°C
55°C
25°C
85°C
25°C
55°C
Min
Typ
Max Units
10K
Cycle
10K
100
Year
25
80K
Cycle
30K
100
Year
25
Table 35-14. Programming time
Symbol Parameter
Chip Erase
Flash
EEPROM
Condition
Min
Flash, EEPROM⁽²⁾ and SRAM Erase
Page Erase
Page Write
Page WriteAutomatic Page Erase and Write
Page Erase
Page Write
Page WriteAutomatic Page Erase and Write
Notes: 1. Programming is timed from the 2MHz internal oscillator.
2. EEPROM is not erased if the EESAVE fuse is programmed.
Typ⁽¹⁾
50
6
6
12
6
6
12
Max Units
ms
35.14 Clock and Oscillator Characteristics
35.14.1 Calibrated 32.768kHz Internal Oscillator characteristics
Table 35-15. Calibrated 32.768kHz Internal Oscillator characteristics
Symbol Parameter
Condition
Frequency
Factory calibration accuracy
User calibration accuracy
T = 85°C, V_CC = 3.0V
Min
Typ
Max Units
32.768
kHz
-0.5
0.5
%
-0.5
0.5
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8387A–AVR–07/11