
1247
SAM9X35 [DATASHEET]
11055E–ATARM–10-Mar-2014
47.7.1 32 kHz Crystal Characteristics
47.7.2 XIN32 Clock Characteristics
Note:
1. These characteristics apply only when the 32.768 kHz Oscillator is in bypass mode (i.e., when RCEN = 0,
OSC32EN = 0, OSCSEL = 1 and OSC32BYP = 1) in the Slow Clock Controller Configuration Register (SCKC_CR).
See “Slow Clock Selection” in the PMC section.
47.8 32 kHz RC Oscillator Characteristics
Table 47-12. 32 kHz Crystal Characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
ESR
Equivalent Series Resistor Rs
Crystal @ 32.768 kHz
50
100
k
Ω
CM
Motional Capacitance
Crystal @ 32.768 kHz
0.6
3
fF
CS
Shunt Capacitance
Crystal @ 32.768 kHz
0.6
2
pF
IDD ON
Current dissipation
RS = 50 kΩ (1) CCRYSTAL32 = 6 pF 0.55
1.3
A
RS = 50 kΩ (1) CCRYSTAL32 = 12.5 pF 0.85
1.6
A
RS = 100 kΩ
CRYSTAL32 = 6 pF
0.7
2.0
A
RS = 100 kΩ (1) CCRYSTAL32 = 12.5 pF 1.1
2.2
A
IDD STDBY
Standby consumption
0.3
A
Table 47-13. XIN32 Clock Characteristics
Symbol
Parameter
Conditions
Min
Max
Unit
1/(tCPXIN32)
XIN32 Clock Frequency
44
kHz
tCPXIN32
XIN32 Clock Period
22
s
tCHXIN32
XIN32 Clock High Half-period
11
s
tCLXIN32
XIN32 Clock Low Half-period
11
s
tCLCH32
XIN32 Clock Rise time
400
ns
tCLCL32
XIN32 Clock Fall time
400
ns
CIN32
XIN32 Input Capacitance
6pF
RIN32
XIN32 Pulldown Resistor
4M
Ω
VIN32
XIN32 Voltage
VDDBU
V
VINIL32
XIN32 Input Low Level Voltage
-0.3
0.3
× VDDBU
V
VINIH32
XIN32 Input High Level Voltage
0.7
× VDDBU
VDDBU + 0.3
V
Table 47-14. 32 kHz RC Oscillator Characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
1/(tCPRCz)
Crystal Oscillator Frequency
20
32
44
kHz
Duty Cycle
45
55
%
tST
Startup Time
75
s
IDD ON
Power Consumption Oscillation
After startup time
1.1
2.1
A
IDD STDBY
Standby consumption
0.4
A