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DP83916 Datasheet(PDF) 62 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # DP83916
Description  SONICTM-16 Systems-Oriented Network Interface Controller
PDF  96 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP83916 Datasheet(HTML) 62 Page - National Semiconductor (TI)

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50 Bus Interface (Continued)
During read cycles (
Figures 5-16 and 5-17 ) data (D15 – D0)
is latched at the falling edge of T2 and DS is asserted at the
falling edge of T1 For write cycles (
Figures 5-18 and 5-19 )
data is driven on the falling edge of T1 If there are wait
states inserted DS is asserted on the falling edge of the first
T2(wait) DS is not asserted for zero wait state write cycles
The SONIC-16 terminates the memory cycle by deasserting
DS at the falling edge of T2
Note
If the setup time for RDYi is met during T1 the full asynchronous bus
cycle will take only 2 bus clocks This may be an unwanted situation
If so RDYi should be deasserted during T1
TLF11722 – 44
FIGURE 5-18 Memory Write BMODEe0 Asynchronous (1 Wait-State)
TLF11722 – 45
FIGURE 5-19 Memory Write BMODEe0 Asynchronous (2 Wait-State)
62



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