参数资料
型号: SAF-XE167GM-72FXXL
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: RISC MICROCONTROLLER, PQFP144
封装: 0.50 MM PITCH, GREEN, PLASTIC, LQFP-144
文件页数: 11/140页
文件大小: 1096K
代理商: SAF-XE167GM-72FXXL
XE167FM, XE167GM, XE167HM, XE167KM
XE166 Family Derivatives / Base Line
Electrical Parameters
Data Sheet
108
V2.0, 2009-03
4.6.2
Definition of Internal Timing
The internal operation of the XE167xM is controlled by the internal system clock
f
SYS.
Because the system clock signal
f
SYS can be generated from a number of internal and
external sources using different mechanisms, the duration of the system clock periods
(TCSs) and their variation (as well as the derived external timing) depend on the
mechanism used to generate
f
SYS. This must be considered when calculating the timing
for the XE167xM.
Figure 18
Generation Mechanisms for the System Clock
Note: The example of PLL operation shown in Figure 18 uses a PLL factor of 1:4; the
example of prescaler operation uses a divider factor of 2:1.
The specification of the external timing (AC Characteristics) depends on the period of the
system clock (TCS).
MC_XC2X_CLOCKGEN
Phase Locked Loop Operation (1:N)
f
IN
Direct Clock Drive (1:1)
Prescaler Operation (N:1)
f
SYS
f
IN
f
SYS
f
IN
f
SYS
TCS
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