at91cap7e ATMEL Corporation, at91cap7e Datasheet - Page 485

• Manufacturer Part Number: at91cap7e
• Description: Customizable Microcontroller
• Manufacturer: ATMEL Corporation

33.5
The following characteristics are applicable to the operating temperature range: T
power supply, unless otherwise specified.
Table 33-6.
Note:
Figure 33-3. 12 MHz Crystal Connection
Table 33-7
Table 33-7.
Table 33-8
Table 33-8.
8549A–CAP–10/08
Symbol
1/(t
C
C
t
I
P
I
I
Symbol
ESR
C
C
Symbol
1/(t
t
t
ST
DDST
DD ON
BYPASS
CPXIN
CHXIN
ON
CRYSTAL
LEXT
M
S
CPMAIN
CPXIN
12 MHz Main Oscillator Characteristics
1. Additional board load capacitance should be subtracted from C
)
)
gives the characteristics that the crystal must satisfy for correct operation with the oscillator.
gives the Electrical Characteristics of the XIN pin when the oscillator is in Bypass Mode.
Main Oscillator Characteristics
Crystal Characteristics
XIN Clock Electrical Characteristics in Bypass Mode
Parameter
Crystal Oscillator Frequency
Crystal Load Capacitance
External Load Capacitance
Duty Cycle
Startup Time
Standby Current Consumption
Drive Level
Current Dissipation
Bypass Current Dissipation
Parameter
Equivalent Series Resistor Rs
Motional Capacitance
Shunt Capacitance
Parameter
XIN Clock Frequency
XIN Clock Period
XIN Clock High Half-period
C
XIN
LEXT
Conditions
Conditions
C
C
Standby mode
@ 12MHz
CRYSTAL
CRYSTAL
AT91CAP7
C
CRYSTAL
= 15 pF
= 20 pF
Conditions
(1)
(1)
C
XOUT
LEXT
LEXT
.
GNDUPLL
0.4 x t
Min
20
CPXIN
Min
15
40
A
8
Min
= -40°C to 85°C and worst case of
5
Typ
450
3.6
12
25
35
50
Typ
0.6 x t
AT91CAP7E
Max
50
CPXIN
Max
150
700
6.2
16
20
60
2
2
Max
60
9
7
μW/MHz
Units
MHz
MHz
Unit
μW
ms
μA
μA
ns
pF
pF
%
Unit
pF
fF
Ω
485