Datasheet

51
32099IS–01/2012
AT32UC3L016/32/64
Notes: 1. Please refer to the SCIF chapter for details.
2. Nominal crystal cycles.
3. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same pro-
cess technology. These values are not covered by test limits in production.
Figure 7-3. Oscillator Connection
7.6.2 32KHz Crystal Oscillator (OSC32K) Characteristics
Figure 7-3 and the equation above also applies to the 32KHz oscillator connection. The user
must choose a crystal oscillator where the crystal load capacitance C
L
is within the range given
in the table. The exact value of C
L
can then be found in the crystal datasheet.
t
STARTUP
Startup time SCIF.OSCCTRL.GAIN = 2
(1)
30 000
(2)
cycles
I
OSC
Current consumption
Active mode, f = 0.45MHz,
SCIF.OSCCTRL.GAIN = 0
30
µA
Active mode, f = 10MHz,
SCIF.OSCCTRL.GAIN = 2
170
Table 7-12. Crystal Oscillator Characteristics
Symbol Parameter Conditions Min Typ Max Unit
XIN
XOUT
C
LEXT
C
LEXT
C
L
C
i
UC3L
Table 7-13. 32 KHz Crystal Oscillator Characteristics
Symbol Parameter Conditions Min Typ Max Unit
f
OUT
Crystal oscillator frequency 32 768 Hz
t
STARTUP
Startup time R
S
= 60kOhm, C
L
= 9pF 30 000
(1)
cycles
C
L
Crystal load capacitance
(2)
612.5
pF
C
i
Internal equivalent load
capacitance
2
I
OSC32
Current consumption 0.9 µA
R
S
Equivalent series resistance
(2)
32 768Hz 35 85 kOhm