at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 765

• Manufacturer Part Number: at91sam9g20-cu
• 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:
41.5.2
Table 41-10. 32 kHz Crystal Characteristics
6384B–ATARM–15-Dec-08
Symbol
1/(t
C
C
t
Symbol
ESR
C
C
ST
CRYSTAL32
LEXT32
M
S
CP32KHz
(2)
Crystal Oscillator Characteristics
1. R
2. C
32 kHz Oscillator Characteristics
)
32 kHz Crystal 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
V
R
V
R
XIN32
DDBU
DDBU
CRYSTAL32
CRYSTAL32
S
S
Conditions
Crystal @ 32.768 kHz
Crystal @ 32.768 kHz
Crystal @ 32.768 kHz
= 50 kΩ
= 100 kΩ
= 1.0V,
= 1.0V
C
= 6 pF
= 12.5 pF
(1)
AT91SAM92G20
CRYSTAL32
(1)
C
LEXT32
XOUT32
C
C
C
C
CRYSTAL32
CRYSTAL32
CRYSTAL32
CRYSTAL32
AT91SAM9G20 Preliminary
GNDBU
= 6 pF
= 12.5 pF
= 6 pF
= 12.5 pF
A
Min
= -40°C to 85°C and worst case of
Min
40
6
Typ
50
32 768
Typ
19
6
Max
100
3
2
1200
Max
12.5
300
900
600
60
Unit
kΩ
pF
pF
Unit
kHz
ms
ms
ms
ms
pF
pF
pF
%
765