Atmel Evaluation Kit AT91SAM9M10-G45-EK AT91SAM9M10-G45-EK データシート
製品コード
AT91SAM9M10-G45-EK
1302
SAM9M10 [DATASHEET]
6355F–ATARM–12-Mar-13
47.5.1
Crystal Oscillator Characteristics
The following characteristics are applicable to the operating temperature range: T
A
= -40°C to 85°C and worst case of
power supply, unless otherwise specified.
47.5.2
XIN Clock Characteristics
Note:
1. These characteristics apply only when the Main Oscillator is in bypass mode (i.e. when MOSCEN = 0 and OSCBYPASS = 1)
in the CKGR_MOR register. See “PMC Clock Generator Main Oscillator Register” in the PMC section.
XIN
XOUT
GNDOSC
C
LEXT
C
LEXT
C
CRYSTAL
SAM9M10
Table 47-8.
Crystal Characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
ESR
Equivalent Series Resistor Rs
80
Ω
C
M
Motional Capacitance
9
fF
C
S
Shunt Capacitance
7
pF
Table 47-9.
XIN Clock Electrical Characteristics
Symbol
Parameter
Conditions
Min
Max
Units
1/(t
CPXIN
)
XIN Clock Frequency
50
MHz
t
CPXIN
XIN Clock Period
20
ns
t
CHXIN
XIN Clock High Half-period
0.4 x t
CPXIN
0.6 x t
CPXIN
ns
t
CLXIN
XIN Clock Low Half-period
0.4 x t
CPXIN
0.6 x t
CPXIN
ns
C
IN
XIN Input Capacitance
25
pF
R
IN
XIN Pulldown Resistor
500
k
Ω
V
IN
XIN Voltage
VDDOSC
VDDOSC
V