參數(shù)資料
型號(hào): SAK-XC2785X-104F80L
廠商: INFINEON TECHNOLOGIES AG
元件分類: 微控制器/微處理器
英文描述: 32-BIT, FLASH, 80 MHz, RISC MICROCONTROLLER, PQFP144
封裝: 0.50 MM PITCH, GREEN, PLASTIC, LQFP-144
文件頁數(shù): 15/141頁
文件大?。?/td> 1793K
代理商: SAK-XC2785X-104F80L
XC2785X
XC2000 Family / Base Line
Electrical Parameters
Data Sheet
111
V2.1, 2011-07
4.6.3
External Clock Input Parameters
These parameters specify the external clock generation for the XC2785X. 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 25
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
8ns
Input clock fall time
t
4 SR
8ns
Input voltage amplitude on
XTAL1
1)
V
AX1 SR
0.3 x
V
DDIM
V
4 to 16 MHz
0.4 x
V
DDIM
V
16 to 25 MHz
0.5 x
V
DDIM
V
25 to 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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