ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 1116

• 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

43.4.6
Table 43-21. 3 to 20 MHz Crystal Oscillator Characteristics
Notes:
Where
1116
Symbol
F
F
T
I
I
P
R
C
C
DD_ON
DD_ST
req
req_bypass
ON
ON
f
LEXT
L
C
1. R
2. Rs = 100-200 Ohms; Cs = 2.0 - 2.5pF; Cm = 2 – 1.5 fF(typ, worst case) using 1 Kohm serial resistor on xout.
3. Rs = 50-100 Ohms; Cs = 2.0 - 2.5pF; Cm = 4 - 3 fF(typ, worst case).
4. Rs = 25-50 Ohms; Cs = 2.5 - 3.0pF; Cm = 7 - 5 fF (typ, worst case).
5. Rs = 20-50 Ohms; Cs = 3.2 - 4.0pF; Cm = 10 - 8 fF(typ, worst case).
PCB
SAM3U Series
3 to 20 MHz Crystal Oscillator 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
Operating Frequency In Bypass Mode
Supply Ripple Voltage (on VDDPLL)
Duty Cycle
Startup Time
Current consumption
Standby Current Consumption
Drive level
Internal resistor
External capacitor on XIN and XOUT
Internal Equivalent Load Capacitance
C
XIN
LEXT
C
LEXT
= 2x(
SAM3U
C
Conditions
Normal mode with crystal
External Clock on XIN
Rms value, 10KHz to 10MHz
3 MHz, C
8 MHz, C
12 to 16 MHz, C
20 MHz, C
3 MHz
8 MHz
12 to 16 MHz
20 MHz
Standby mode @ 3.6V
3 MHz
8 MHz
1 2MHz, 16 MHz, 20 MHz
between XIN and XOUT
Integrated Load Capacitance
(XIN and XOUT in series)
Crystal
C
CRYSTAL
C
L
(2)
(3)
(5)
SHUNT
SHUNT
SHUNT
–
(4)
R = 1K if Crystal Frequency
C
C
XOUT
= 3pF
= 7pF
LEXT
L
SHUNT
is lower than 8 MHz
= 7pF
–
C
PCB
= 7pF
).
12.5
Min
7.5
40
3
Typ
150
150
300
400
9.5
16
50
1
Max
14.5
17.5
11.5
250
250
450
550
1.4
20
50
30
60
15
30
50
4
1
5
6430D–ATARM–25-Mar-11
MHz
MHz
Unit
mV
μW
MΩ
ms
μA
nA
pF
pF
%