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ST10R272 Scheda tecnica(PDF) 50 Page - STMicroelectronics

Il numero della parte ST10R272
Spiegazioni elettronici  16-BIT LOW VOLTAGE ROMLESS MCU WITH MAC
PDF  77 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST10R272 Scheda tecnica(HTML) 50 Page - STMicroelectronics

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ST10R272L - ELECTRICAL CHARACTERISTICS
where
N = number of consecutive TCLs and 1
≤ N ≤ 40. So for a period of 3 TCLs (i.e. N = 3):
and
PLL jitter is an important factor for bus cycles using waitstates and for the operation of timers,
serial interfaces, etc. For slower operations and longer periods (e.g. pulse train generation or
measurement, lower baudrates, etc.) the deviation caused by the PLL jitter is negligible.
Figure 15 Approximated maximum PLL jitter
D
3
43 15
⁄
–
=
3.8%
=
3TCL
min
3TCL
NOM
1
3.8 100
⁄
–
()
×
=
3TCL
NOM
0.962 36.07nsec @fcpu=50MHz
()
×
=
32
16
8
4
2
±1
±2
±3
±4
Max.jitter [%]
N
This formula is valid for 1<N<40 and 10<fcpu<50
1



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