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DP8344 Datasheet(PDF) 102 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # DP8344
Description  Biphase Communications Processor?좦CP
PDF  184 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP8344 Datasheet(HTML) 102 Page - National Semiconductor (TI)

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50 Device Specifications (Continued)
TABLE 5-6 Clock Timing (Note 1)
Symbol
ID
Parameter
Formula
Min
Max
Units
tT-X1
1
X1 Period (Note 2)
50
500
ns
tPD-X1-CO
2
X1 to CLK-OUT (Note 2)
37
ns
tPD-CO-ICLKr
3
CLK-OUT Rising to ICLK Rising
15
ns
tPD-CO-ICLKf
4
CLK-OUT Rising to ICLK Falling (Note 3)
15
ns
tT-XT
5
X-TCLK Period (Note 4)
50
500
ns
tW-X1HL
6
X1 High and Low time Pulse Widths (Note 5)
21
ns
tW-XTHL
7
XTCLK High and Low Time Pulse Widths
15
ns
Note 1
All parameters are individually tested and guaranteed Interpreting this data by numerically adding two or more parameters to create a new timing
specification may lead to invalid results
Note 2
Measurement thresholds at 25V
Note 3
The falling edge of ICLK occurs only after the next IA becomes valid The CLK-OUT cycle in which this occurs depends on the instruction being executed
and the number of programmed instruction wait states
Note 4
There is no relationship between X1 and X-TCLK X-TCLK is fully asynchronous
Note 5
External loading on pin X2 equal to 15 pF See
Figure 5-6b for affect of X2 loading in non-crystal applications (ie an external oscillator driving X1)
TLF9336 – 55
TLF9336 – H8
FIGURE 5-6 Clock Timing
102



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