AT32UC3L064_11 ATMEL [ATMEL Corporation], AT32UC3L064_11 Datasheet - Page 50

• Manufacturer Part Number: AT32UC3L064_11
• Description: 32-bit Atmel AVR Microcontroller
• Manufacturer: ATMEL [ATMEL Corporation]

Table 7-10.
Note:
7.6
7.6.1
7.6.1.1
Table 7-11.
7.6.1.2
Table 7-12.
32099HS–12/2011
Symbol
t
f
Symbol
f
t
t
C
Symbol
f
C
C
FALL
MAX
CPXIN
CPXIN
STARTUP
OUT
IN
L
i
1. V
Oscillator Characteristics
Oscillator 0 (OSC0) Characteristics
VDD
Parameter
Fall time
Max frequency
Digital Clock Characteristics
Crystal Oscillator Characteristics
TWI Pin Characteristics
Digital Clock Characteristics
Crystal Oscillator Characteristics
Parameter
Crystal oscillator frequency
Crystal load capacitance
Internal equivalent load capacitance
corresponds to either V
Parameter
XIN clock frequency
XIN clock duty cycle
Startup time
XIN input capacitance
The following table describes the characteristics for the oscillator when a digital clock is applied
on XIN.
The following table describes the characteristics for the oscillator when a crystal is connected
between XIN and XOUT as shown in
where the crystal load capacitance
can be found in the crystal datasheet. The capacitance of the external capacitors (C
then be computed as follows:
where C
PCB
VDDIN
(1)
is the capacitance of the PCB and
or V
Cbus = 400pF, V
Cbus = 400pF, V
Cbus = 400pF, V
Condition
VDDIO
, depending on the supply for the pin. Refer to
Conditions
Conditions
TQFP48 package
QFN48 package
TLLGA48 package
VDD
VDD
VDD
C
C
> 2.0V
> 1.62V
> 2.0V
L
LEXT
is within the range given in the table. The exact value of C
Figure
=
2 C
(
C
7-3. The user must choose a crystal oscillator
L
i
–
is the internal equivalent load capacitance.
Min
400
C
Min
i
) C
–
40
PCB
AT32UC3L016/32/64
0.45
Min
6
Typ
250
470
Typ
Section 3.2 on page 9
7.0
6.7
6.7
0
Typ
10
2
Max
Max
50
60
Max
16
18
Units
Units
for details.
kHz
LEXT
cycles
ns
MHz
MHz
Unit
pF
pF
%
) can
50
L