Datasheet

145
XMEGA A3U [DATASHEET]
Atmel-8386D-AVR-ATxmega64A3U-128A3U-192A3U-256A3U–03/2014
Table 36-117.Programming time.
Notes: 1. Programming is timed from the 2MHz internal oscillator.
2. EEPROM is not erased if the EESAVE fuse is programmed.
36.4.14 Clock and Oscillator Characteristics
36.4.14.1 Calibrated 32.768kHz Internal Oscillator characteristics
Table 36-118. 32.768kHz internal oscillator characteristics.
36.4.14.2 Calibrated 2MHz RC Internal Oscillator characteristics
Table 36-119. 2MHz internal oscillator characteristics.
Symbol Parameter Condition Min. Typ.
(1)
Max. Units
Chip Erase 256KB Flash, EEPROM
(2)
and SRAM Erase 105 ms
Application Erase Section erase 6 ms
Flash
Page Erase 4
msPage Write 4
Atomic Page Erase and Write 8
EEPROM
Page Erase 4
msPage 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 ms
Symbol Parameter Condition Min. Typ. Max. Units
Frequency range
DFLL can tune to this frequency over
voltage and temperature
1.8 2.2 MHz
Factory calibrated frequency 2.0 MHz
Factory calibration accuracy T = 85C, V
CC
= 3.0V -1.5 1.5 %
User calibration accuracy -0.2 0.2 %
DFLL calibration stepsize 0.22 %