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| ATXMEGA128B1 Datasheet, PDF (79/138 Pages) ATMEL Corporation – 8/16-bit Atmel XMEGA B1 Microcontroller | |||
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36.13 Flash and EEPROM Memory Characteristics
Table 36-18. Endurance and data retention.
Symbol Parameter
Flash
EEPROM
Condition
Write/Erase cycles
25°C
85°C
Data retention
25°C
55°C
Write/Erase cycles
25°C
85°C
Data retention
25°C
55°C
Min
10K
10K
100
25
100K
100K
100
25
Table 36-19. Programming time.
Symbol Parameter
Chip Erase
Flash
EEPROM
Condition
Min
128KB Flash, EEPROM(2)
64KB Flash, EEPROM(2)
Page Erase
Page Write
Page Write Automatic Page Erase and Write
Page Erase
Page Write
Page Write Automatic 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
Typ(1)
75
55
4
4
8
4
4
8
Max Units
Cycle
Year
Cycle
Year
Max Units
ms
36.14 Clock and Oscillator Characteristics
36.14.1 Calibrated 32.768kHz Internal Oscillator characteristics
Table 36-20. Calibrated 32.768kHz internal oscillator characteristics.
Symbol Parameter
Frequency
Factory calibrated accuracy
User calibration accuracy
Condition
T = 85ï°C, VCC = 3.0V
Min
Typ
Max Units
32.768
kHz
-0.5
0.5
%
-0.5
0.5
XMEGA B1 [DATASHEET] 79
8330CâAVRâ07/2012
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