参数资料
型号: SAH-XC2261N-24F20L
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PQFP100
封装: 0.50 MM PITCH, GREEN, PLASTIC, LQFP-100
文件页数: 6/131页
文件大小: 1627K
代理商: SAH-XC2261N-24F20L
XC2261N/68N, XC2263N/64N/65N
XC2000 Family / Value Line
Electrical Parameters
Data Sheet
103
V1.4, 2011-07
4.7.3
External Clock Input Parameters
These parameters specify the external clock generation for the XC226xN. The clock can
be generated in two ways:
By connecting a crystal or ceramic resonator to pins XTAL1/XTAL2.
By supplying an external clock signal
– This clock signal can be supplied either to pin XTAL1 (core voltage domain) or to
pin CLKIN1 (IO voltage domain).
If connected to CLKIN1, the input signal must reach the defined input levels
V
IL and VIH.
If connected to XTAL1, a minimum amplitude
V
AX1 (peak-to-peak voltage) is sufficient for
the operation of the on-chip oscillator.
Note: The given clock timing parameters (
t
1 … t4) are only valid for an external clock
input signal.
Note: Operating Conditions apply.
Table 27
External Clock Input Characteristics
Parameter
Symbol
Values
Unit
Note /
Test Condition
Min.
Typ.
Max.
Oscillator frequency
f
OSC SR
4
40
MHz
Input= Clock
Signal
4
16
MHz
Input= Crystal
or Ceramic
Resonator
XTAL1 input current
absolute value
|
I
IL| CC
20
μA
Input clock high time
t
1 SR
6
ns
Input clock low time
t
2 SR
6
ns
Input clock rise time
t
3 SR
88
ns
Input clock fall time
t
4 SR
88
ns
Input voltage amplitude on
XTAL1
1)
V
AX1 SR
0.3 x
V
DDIM
V
f
OSC≥ 4MHz;
f
OSC<16MHz
0.4 x
V
DDIM
V
f
OSC≥ 16 MHz;
f
OSC< 25 MHz
0.5 x
V
DDIM
V
f
OSC≥ 25 MHz;
f
OSC≤ 40 MHz
Input voltage range limits
for signal on XTAL1
V
IX1 SR
-1.7 +
V
DDIM
1.7
V
2)
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