Datasheet

713
11011B–ATARM–21-Feb-12
SAM3N
35.4.5 32.768 kHz XIN32 Clock Input Characteristics in Bypass Mode
Note: 1. These characteristics apply only when the 32768 kHz XTAL Oscillator is in bypass mode (i.e., when OSCBYPASS: = 1 in
SUPC_MR and XTALSEL = 1 in the SUPC_CR registers.
Table 35-23. XIN32 Clock Electrical Characteristics (In Bypass Mode)
Symbol Parameter Conditions Min Max Units
1/(t
CPXIN32
) XIN32 Clock Frequency
(1)
44 kHz
t
CPXIN32
XIN32 Clock Period
(1)
22 µs
t
CHXIN32
XIN32 Clock High Half-period
(1)
11 µs
t
CLXIN32
XIN32 Clock Low Half-period
(1)
11 µs
C
IN
XIN32 Input Capacitance 6 pF
R
IN
XIN32 Pull-down Resistor 3 5 MΩ
V
XIN32_IL
V
XIN32
Input Low-level Voltage -0.3 0.3 x V
DDIO
V
V
XIN32_IH
V
XIN32
Input High-level Voltage 0.7 x V
DDIO
V
DDIO
+0.3 V
t
CPXIN
t
CPXIN
t
CPXIN
t
CHXIN
V
XIN_IL
V
XIN_IH