参数资料
型号: SAB-XC167CI-16F20F
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP144
封装: 0.50 MM PITCH, PLASTIC, TQFP-144
文件页数: 64/80页
文件大小: 2477K
代理商: SAB-XC167CI-16F20F
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
Unit
min.
max.
Oscillator period
tOSC SR 20
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.
t1
SR
6
ns
Low time2)
t2
SR
6
ns
Rise time2)
t3
SR
8
ns
Fall time2)
t4
SR
8
ns
MCT05138
3
t
4
t
VIHC
VILC
V
DDI
0.5
1
t
2
t
OSC
t
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