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DP83266 Datasheet(PDF) 41 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # DP83266
Description  MACSITM Device (FDDI Media Access Controller and System Interface)
PDF  152 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP83266 Datasheet(HTML) 41 Page - National Semiconductor (TI)

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60 Functional Description (Service Engine) (Continued)
TLF11705 – 15
FIGURE 6-10 Enhanced ABus Mode Burst Write Timing
Single Write
Tbr MACSI device asserts AB
BR to indicate it wishes to
perform a transfer Host asserts AB
BG The MACSI de-
vice moves to Tma in the next cycle
Tma MACSI device drives AB
A and AB
AD with the
master address asserts AB
AS drives AB
RW and
AB
SIZ 20
and negates AB
BR until the end of this
transaction
Tpa The Physical address is asserted by the MMU
Td MACSI device negates AB
AS drives AB
AD with the
write data and starts sampling AB
ACK AB
ERR and
AB
DEN Slave captures AB
AD data and acknowledges
with AB
ACK AB
ERR and AB
DEN Tw states may
occur after Td if the slave does not acknowledge
Tr MACSI device negates AB
RW AB
SIZ 20 releas-
es AB
A
AB
AD
and AB
AS
and stops driving
AB
AD with data Slave deasserts AB
ACK AB
ERR
and AB
DEN
41



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