參數(shù)資料
型號： SAF-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)： 9/141頁
文件大?。?/td> 1793K
代理商： SAF-XC2785X-104F80L
XC2785X
XC2000 Family / Base Line
Electrical Parameters
Data Sheet
106
V2.1, 2011-07
4.6.2
Definition of Internal Timing
The internal operation of the XC2785X 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 XC2785X.
Figure 19
Generation Mechanisms for the System Clock
Note: The example of PLL operation shown in Figure 19 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).
M C_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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