AT32UC3C1512C Automotive Atmel Corporation, AT32UC3C1512C Automotive Datasheet - Page 1254

• Manufacturer Part Number: AT32UC3C1512C Automotive
• Manufacturer: Atmel Corporation

Table 40-8.
Notes:
40.6.2
40.6.2.1
Table 40-9.
40.6.2.2
Table 40-10. 32 KHz Crystal Oscillator Characteristics
9166C–AVR-08/11
Symbol
f
C
t
Symbol
f
t
t
t
C
Symbol
f
t
C
C
OUT
STARTUP
CPXIN
CPXIN
CHXIN
CLXIN
OUT
STARTUP
i
IN
L
i
1. Please refer to the SCIF chapter for details.
32KHz Crystal Oscillator (OSC32K) Characteristics
Digital Clock Characteristics
Crystal Oscillator Characteristics
Crystal Oscillator Characteristics
Digital 32KHz Clock Characteristics
Parameter
Crystal oscillator frequency
Internal equivalent load capacitance
Startup time
Parameter
Crystal oscillator frequency
Startup time
Crystal load capacitance
Internal equivalent load
capacitance
Parameter
XIN32 clock frequency
XIN32 clock period
XIN32 clock high half-priod
XIN32 clock low half-priod
XIN32 input capacitance
The following table describes the characteristics for the oscillator when a digital clock is applied
on XIN32.
Figure 40-2
must choose a crystal oscillator where the crystal load capacitance
in the table. The exact value of
and the equation above also applies to the 32KHz oscillator connection. The user
Conditions
R
S
= 50 kOhm, C
Conditions
f
SCIF.OSCCTRL.GAIN = 1
f
SCIF.OSCCTRL.GAIN = 2
OUT
OUT
= 8MHz
= 16MHz
Conditions
C
L
can then be found in the crystal datasheet..
L
= 12.5pF
(1)
(1)
0.4 x t
0.4 x t
Min
200
CPXIN
CPXIN
Min
0.4
Min
6
32.768
Typ
2
1100
Typ
975
1.7
32 768
C
Typ
L
1.4
2
is within the range given
0.6 x t
0.6 x t
AT32UC3C
5000
Max
Max
CPXIN
CPXIN
20
Max
15
MHz
Unit
Units
pF
us
us
KHz
pF
ns
ns
ns
Unit
Hz
pF
pF
s
1254