Datasheet

108
XMEGA A1U [DATASHEET]
Atmel-8385H-AVR-ATxmega64A1U-128A1U-Datasheet–AVR–04/2014
Table 37-54. Programming time.
Notes: 1. Programming is timed from the 2MHz internal oscillator.
2. EEPROM is not erased if the EESAVE fuse is programmed.
37.2.14 Clock and Oscillator Characteristics
37.2.14.1 Calibrated 32.768kHz Internal Oscillator characteristics
Table 37-55. 32.768kHz internal oscillator characteristics.
37.2.14.2 Calibrated 2MHz RC Internal Oscillator characteristics
Table 37-56. 2MHz internal oscillator characteristics.
Symbol Parameter Condition Min. Typ.
(1)
Max. Units
Chip Erase 128KB Flash, EEPROM
(2)
and SRAM Erase 75
ms
Flash
Page Erase 4
Page Write 4
Atomic Page Erase and Write 8
EEPROM
Page Erase 4
Page Write 4
Atomic Page Erase and Write 8
Symbol Parameter Condition Min. Typ. Max. Units
Frequency 32.768 kHz
Factory calibration accuracy T = 85C, V
CC
= 3.0V -0.5 0.5
%
User calibration accuracy -0.5 0.5
Symbol Parameter Condition Min. Typ. Max. Units
Tunable frequency range
DFLL can tune to this frequency over
voltage and temperature
1.8 2.2
MHz
Factory calibrated frequency 2.0
Factory calibration accuracy T = 85C, V
CC
= 3.0V -1.5 1.5
%
DFLL calibration stepsize T = 25C, V
CC
= 3.0V 0.23