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ST10R172L データシート(PDF) 41 Page - STMicroelectronics

部品番号 ST10R172L
部品情報  16-BIT LOW VOLTAGE ROMLESS MCU
PDF  68 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST10R172L データシート(HTML) 41 Page - STMicroelectronics

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ST10R172L - 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 12 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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