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ST10F269ZX Scheda tecnica(PDF) 147 Page - STMicroelectronics

Il numero della parte ST10F269ZX
Spiegazioni elettronici  16-BIT MCU WITH MAC UNIT, 128K to 256K BYTE FLASH MEMORY AND 12K BYTE RAM
PDF  184 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST10F269ZX Scheda tecnica(HTML) 147 Page - STMicroelectronics

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between two consecutive edges of the CPU clock,
called “TCL”.
The CPU clock signal can be generated by
different mechanisms. The duration of TCL and its
variation (and also the derived external timing)
depends on the mechanism used to generate
fCPU.
This influence must be regarded when calculating
the timings for the ST10F269.
The
example
for
PLL
operation
shown
in
Figure 68 refers to a PLL factor of 4.
The mechanism used to generate the CPU clock is selected during reset by the logic levels on pins
P0.15-13 (P0H.7-5).
Figure 68 : Generation Mechanisms for the CPU Clock
TCL TCL
TCL TCL
fCPU
fXTAL
fCPU
fXTAL
Phase locked loop operation
Direct Clock Drive
TCL
TCL
fCPU
fXTAL
Prescaler Operation



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