ST40RA166 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'ST40RA166' PDF : 88 Pages View PDF
ST40RA166
6 Electrical specifications
6.10
Low power CLKIN AC specifications
The timings referenced in Figure 17 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 LPCLKOSC output is
<2pF. .
Symbol
Parameter
Min Nom Max
tLCLLCL
LPCLKIN period
32
LPCLKIN duty cycle
tLCr
LPCLKIN rise time
tLCf
LPCLKIN fall time
10
50
90
10
10
Table 30: LPCLKIN timings
a. Measured between corresponding points on consecutive falling edges.
b. Variation of individual falling edges from their nominal times.
c. When driven by an external clock.
d. Transitions must be monotonic within the range VIH to VIL
Units
kHz
%
ns
ns
Notes
a, b
c, d
3, 4
VDDRTC * 0.8
VDDRTC * 0.5
VDDRTC * 0.2
tLCLLCL
90%
10%
90%
10%
tLCf
tLCr
Figure 17: CLKIN timings
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