Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Data Sheet
Product codes
AT91SAM9N12-EK
1049
SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]
11063K–ATARM–05-Nov-13
48.4.4 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 sup-
ply, unless otherwise specified.
48.4.5 XIN Clock Characteristics
Notes: 1. These characteristics apply only when the Main Oscillator is in bypass mode (i.e. when MOSCEN = 0 and OSCBY-
PASS = 1) in the CKGR_MOR register.
See “PMC Clock Generator Main Oscillator Register” in the PMC section.
2. Do not exceed 3.6V
Table 48-8. Crystal Characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
ESR
Equivalent Series Resistor Rs
fundamental @3MHz
fundamental @8MHz
fundamental @16MHz
fundamental @20MHz
200
100
80
50
Ω
C
M
Motional Capacitance
8
fF
C
S
Shunt Capacitance
7
pF
Table 48-9. 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 Pull-down Resistor
500
k
Ω
V
XINLOW
XIN Low Voltage
-0.3V
0.3 x VDDOSC
V
V
XINHIGH
XIN High Voltage
0.7 x VDDOSC
VDDOSC+0.3
V