IMSC011 データシートの表示（PDF） - STMicroelectronics
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IMSC011 Datasheet PDF : 30 Pages
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IMS C011
Symbol
TDCLDCH
TDCHDCL
TDCLDCL
TDCerror
TDC1DC2
TDCr
TDCf
Parameter
ClockIn pulse width low
ClockIn pulse width high
ClockIn period
ClockIn timing error
Difference in ClockIn for 2 linked devices
ClockIn rise time
ClockIn fall time
Min Nom Max Units
40
ns
40
ns
200
ns
0.5 ns
400 ppm
10
ns
8
ns
Notes
1
1
1,2,4
1,3
1,4
1,5
1,5
Notes
1 Guaranteed, but not tested.
2 Measured between corresponding points on consecutive falling edges.
3 Variation of individual falling edges from their nominal times.
4 This value allows the use of 200ppm crystal oscillators for two devices connected together by
a link.
5 Clock transitions must be monotonic within the range VIH to VIL (table 7.3).
Table 3.1 Input clock
TDCerror
2.0V
1.5V
0.8V
TDCerror
TDCerror
TDCLDCH
TDCHDCL
TDCLDCL
TDCerror
90%
10%
TDCf
90%
10%
TDCr
Figure 3.2 ClockIn timing
3.4 SeparateIQ
The IMS C011 link adaptor has two different modes of operation. Mode 1 is basically a link to peripheral
adaptor, whilst Mode 2 interfaces between a link and a microprocessor bus system.
Mode 1 can be selected for one of two link speeds by connecting SeparateIQ to VDD (10 Mbits/sec) or
to ClockIn (20 Mbits/sec).
Mode 2 is selected by connecting SeparateIQ to GND; in this mode 10 Mbits/sec or 20 Mbits/sec is se-
lected by LinkSpeed. Link speeds are specified for a ClockIn frequency of 5 MHz.
In order to select the link speed, SeparateIQ may be changed dynamically providing the link is in a quies-
cent state and no input or output is required. Reset must be applied subsequent to the selection to initialise
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