at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 1000

• Manufacturer Part Number: at91sam9263
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

46.5
The following characteristics are applicable to the operating temperature range: T
power supply, unless otherwise specified.
46.5.1
Table 46-9.
Notes:
46.5.2
Table 46-10. 32 kHz Crystal Characteristics
1000
Symbol
1/(t
C
C
t
Symbol
ESR
C
C
ST
CRYSTAL32
LEXT32
M
S
CP32KHz
Crystal Oscillator Characteristics
1. R
2. C
3. Additional user load capacitance should be subtracted from C
(2)
AT91SAM9263 Preliminary
32 kHz Oscillator Characteristics
)
32 kHz Crystal Characteristics
S
LEXT32
is the equivalent series resistance, C
32 kHz Oscillator Characteristics
Parameter
Crystal Oscillator Frequency
Crystal 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.
XIN32
C
LEXT32
Conditions
Crystal @ 32.768 kHz
Crystal @ 32.768 kHz
Crystal @ 32.768 kHz
Conditions
Crystal @ 32.768 kHz
C
C
R
R
R
R
L
CRYSTAL32
CRYSTAL32
S
S
S
S
is the equivalent load capacitance.
= 50 kΩ, C
= 50 kΩ, C
= 100 kΩ, C
= 100 kΩ, C
C
CRYSTAL32
AT91SAM9263
= 6pF
= 12.5pF
L
L
XOUT32
L
L
= 6pF
= 12.5 pF
(3)
= 6pF
= 12.5 pF
C
(3)
LEXT32
(1)
LEXT32
(1)
(1)
(1)
.
GNDBU
A
Min
Min
= -40°C to 85°C and worst case of
40
0.6
0.6
6
32.768
Typ
Typ
17
50
4
6249D–ATARM–20-Dec-07
1200
Max
12.5
Max
400
900
600
100
60
3
2
Unit
kHz
Unit
ms
ms
ms
ms
pF
pF
pF
%
kΩ
pF
fF