Datasheet

1304
SAM9M10 [DATASHEET]
6355F–ATARM–12-Mar-13
47.6.2 XIN32 Clock Characteristics
Note: 1. These characteristics apply only when the 32.768KHz Oscillator is in bypass mode (i.e. when RCEN = 0, OSC32EN = 0,
OSCSEL = 1 and OSC32BYP = 1) in the SCKCR register. See “Slow Clock Selection” in the PMC section.
47.7 32 kHz RC Oscillator Characteristics
Table 47-12. XIN32 Clock Electrical Characteristics
Symbol Parameter Conditions Min Max Units
1/(t
CPXIN32
) XIN32 Clock Frequency 44 kHz
t
CPXIN32
XIN32 Clock Period 22 μs
t
CHXIN32
XIN32 Clock High Half-period 11 μs
t
CLXIN32
XIN32 Clock Low Half-period 11 μs
t
CLCH32
XIN32 Clock Rise time 400 ns
t
CLCL32
XIN32 Clock Fall time 400 ns
C
IN32
XIN32 Input Capacitance
(1)
6pF
R
IN32
XIN32 Pulldown Resistor
(1)
4MΩ
V
IN32
XIN32 Voltage
(1)
VDDBU VDDBU V
V
INIL32
XIN32 Input Low Level Voltage
(1)
-0.3 0.3 x V
VDDBU
V
V
INIH32
XIN32 Input High Level Voltage
(1)
0.7 x V
VDDBU
V
VDDBU
+ 0.3 V
Table 47-13. RC Oscillator Characteristics
Symbol Parameter Conditions Min Typ Max Unit
1/(t
CPRCz
) Crystal Oscillator Frequency 22 42 kHz
Duty Cycle 45 55 %
t
ST
Startup Time 75 μs