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ST40RA Folha de dados(PDF) 56 Page - STMicroelectronics

Nome de Peças ST40RA
Descrição Electrónicos  32-bit Embedded SuperH Device
PDF  94 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST40RA Folha de dados(HTML) 56 Page - STMicroelectronics

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ST40RA
7 Electrical specifications
7.9
System CLKIN AC specifications
The timings referenced in
Figure 16 refer to the case where CLKIN is directly clocked from an
external source. In this case care should be taken that the total load on the CLOCKOSC output is
<2pF.
Symbol
Parameter
Min
Nom
Max
Units
Notes
tCLCH
CLKIN pulse width low
6
ns
tCHCL
CLKIN pulse width high
6
ns
tCLCL
CLKIN period
27
MHz
a
a. Measured between corresponding points on consecutive falling edges.
tCr
CLKIN rise time
10
ns
b, c
b. When driven by an external clock.
c. Clock transitions must be monotonic within the range VIH to VIL.
tCf
CLKIN fall time
10
ns
2, 3
Table 30: CLKIN timings
Figure 16: CLKIN timings
VDDCORE * 0.8
VDDCORE * 0.5
VDDCORE * 0.2
tCLCH
tCHCL
tCLCL
90%
10%
tCf
90%
10%
tCr



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