參數(shù)資料
型號: XC167CI
廠商: INFINEON TECHNOLOGIES AG
英文描述: 16-Bit Single-Chip Microcontroller Preliminary
中文描述: 16位單片機的初步
文件頁數(shù): 67/80頁
文件大?。?/td> 2477K
代理商: XC167CI
XC167
Derivatives
Timing Parameters
Data Sheet
63
V1.1, 2003-06
Preliminary
5.2
External Clock Drive XTAL1
Figure 17
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 guaranteed by
design only (not 100% tested).
Table 16
External Clock Drive Characteristics
(Operating Conditions apply)
Parameter
Symbol
Limit Values
min.
20
6
6
Unit
max.
250
1)
8
8
Oscillator period
High time
2)
Low time
2)
Rise time
2)
Fall time
2)
t
OSC
SR
t
1
t
2
t
3
t
4
1)
The maximum limit is only relevant for PLL operation to ensure the minimum input frequency for the PLL.
2)
The clock input signal must reach the defined levels
V
ILC
and
V
IHC
.
ns
ns
ns
ns
ns
SR
SR
SR
SR
MCT05138
3
t
4
t
V
IHC
V
ILC
V
DDI
0.5
1
t
2
t
OSC
t
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