ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 1114

• Manufacturer Part Number: ATSAM3U-EK
• Description: KIT EVAL FOR AT91SAM3U CORTEX
• Manufacturer: Atmel
• Type: MCUr

Specifications of ATSAM3U-EK

• Contents: Board
• Processor To Be Evaluated: SAM3U
• Data Bus Width: 32 bit
• Interface Type: RS-232, USB
• Operating Supply Voltage: 3 V
• Silicon Manufacturer: Atmel
• Core Architecture: ARM
• Core Sub-architecture: Cortex - M3
• Silicon Core Number: SAM3U4E
• Silicon Family Name: SAM3U
• Kit Contents: Board CD Docs
• Rohs Compliant: Yes
• For Use With/related Products: AT91SAM3U
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

43.4.3
Table 43-18. 32.768 kHz Crystal Oscillator Characteristics
Notes:
Where
43.4.4
Table 43-19. Crystal Characteristics
1114
Symbol
F
I
P
R
C
C
Symbol
ESR
C
C
DDST
req
ON
f
LEXT
para
M
SHUNT
C
1. R
PCB
SAM3U Series
32.768 kHz Crystal Oscillator Characteristics
32.768 kHz Crystal Characteristics
is the capacitance of the printed circuit board (PCB) track layout from the crystal to the SAM3U pin.
S
is the series resistor.
Parameter
Operating Frequency
Supply Ripple Voltage (on VDDBU)
Duty Cycle
Startup Time
Current consumption
Standby Current Consumption
Drive level
Internal resistor
Maximum external capacitor
on XIN32 and XOUT32
Internal Parasitic Capacitance
Parameter
Equivalent Series Resistor Rs
Motional capacitance
Shunt capacitance
C
LEXT
XIN32
C
LEXT
= 2x(
C
CRYSTAL
Conditions
Normal mode with crystal
Rms value, 10 KHz to 10 MHz
Rs < 50KΩ
Rs < 100KΩ
(1)
Rs < 50KΩ
Rs < 100KΩ
(1)
Standby mode @ 3.6V
between XIN32 and XOUT32
Conditions
Crystal @ 32.768 KHz
Crystal @ 32.768 KHz
Crystal @ 32.768 KHz
SAM3U
–
C
para
–
C
CL = 12.5pF
CL = 6pF
CL = 12.5pF
CL = 6pF
CL = 12.5pF
CL = 6pF
CL = 12.5pF
CL = 6pF
PCB
C
XOUT32
LEXT
).
Min
0.6
0.6
Min
1.2
40
Typ
650
450
900
650
1.4
Typ
50
10
50
32.768
1200
1400
1200
1600
1400
Max
900
300
500
0.1
1.6
30
60
22
5
6430D–ATARM–25-Mar-11
Max
100
3
2
Unit
KHz
mV
μW
MΩ
ms
nA
nA
pF
pF
%
Unit
KΩ
pF
fF