at91sam9260-cj ATMEL Corporation, at91sam9260-cj Datasheet - Page 730

• Manufacturer Part Number: at91sam9260-cj
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

41.5
The following characteristics are applicable to the operating temperature range: T
power supply, unless otherwise specified.
41.5.1
Table 41-9.
Notes:
Table 41-10. Crystal Characteristics
730
Symbol
1/(t
C
C
t
Symbol
ESR
C
C
ST
CRYSTAL32
LEXT32
M
S
CP32KHz
(2)
Crystal Oscillator Characteristics
1. R
2. C
AT91SAM9260
32 kHz Oscillator Characteristics
)
S
LEXT32
is the equivalent series resistance.
32 kHz Oscillator Characteristics
Parameter
Crystal Oscillator Frequency
Load Capacitance
External Load Capacitance
Duty Cycle
Startup Time
Parameter
Equivalent Series Resistor Rs
Motional Capacitance
Shunt Capacitance
is determined by taking into account internal, parasitic and package load capacitance.
C
LEXT32
Conditions
Crystal @ 32.768 kHz
C
C
R
R
XIN32
CRYSTAL32
CRYSTAL32
S
S
Conditions
Crystal @ 32.768 kHz
Crystal @ 32.768 kHz
Crystal @ 32.768 kHz
= 50 kΩ
= 100 kΩ
C
= 6 pF
= 12.5 pF
(1)
AT91SAM9260
CRYSTAL32
(1)
C
LEXT32
XOUT32
C
C
C
C
CRYSTAL32
CRYSTAL32
CRYSTAL32
CRYSTAL32
GNDBU
= 6 pF
= 12.5 pF
= 6 pF
= 12.5 pF
A
Min
= -40°C to 85°C and worst case of
0.8
1
Min
40
6
Typ
50
32 768
Typ
17
4
6221G–ATARM–31-Jan-08
Max
100
1.7
3
1200
Max
12.5
300
900
600
60
Unit
kΩ
pF
fF
Unit
kHz
ms
ms
ms
ms
pF
pF
pF
%