參數(shù)資料
型號(hào): SAF-XC164GM-8F40F
廠商: INFINEON TECHNOLOGIES AG
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP64
封裝: 0.50 MM PITCH, GREEN, PLASTIC, TQFP-64
文件頁數(shù): 62/69頁
文件大小: 1964K
代理商: SAF-XC164GM-8F40F
XC164GM
Derivatives
Electrical Parameters
Data Sheet
63
V1.2, 2007-03
4.4.3
External Clock Drive XTAL1
These parameters define the external clock supply for the XC164GM.
Figure 16
External Clock Drive XTAL1
Note: If the on-chip oscillator is used together with a crystal or a ceramic resonator, the
oscillator frequency is limited to a range of 4 MHz to 16 MHz.
It is strongly recommended to measure the oscillation allowance (negative
resistance) in the final target system (layout) to determine the optimum
parameters for the oscillator operation. Please refer to the limits specified by the
crystal supplier.
When driven by an external clock signal it will accept the specified frequency
range. Operation at lower input frequencies is possible but is verified by design
only (not subject to production test).
Table 19
External Clock Drive Characteristics (Operating Conditions apply)
Parameter
Symbol
Limit Values
Unit
Min.
Max.
Oscillator period
t
OSC
SR
25
2501)
1) The maximum limit is only relevant for PLL operation to ensure the minimum input frequency for the PLL.
ns
High time2)
2) The clock input signal must reach the defined levels
VILC and VIHC.
t
1
SR
6–ns
Low time2)
t
2
SR
6–ns
Rise time2)
t
3
SR
–8ns
Fall time2)
t
4
SR
–8ns
MCT05572
t
1
t
2
t
OSC
t
3
t
4
0.5
V
DDI
V
ILC
V
IHC
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