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DP83266 bảng dữ liệu(PDF) 36 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
tên linh kiện DP83266
Giải thích chi tiết về linh kiện  MACSITM Device (FDDI Media Access Controller and System Interface)
PDF  152 Pages
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nhà sản xuất  NSC [National Semiconductor (TI)]
Trang chủ  http://www.national.com
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DP83266 bảng dữ liệu(HTML) 36 Page - National Semiconductor (TI)

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60 Functional Description (Service Engine) (Continued)
Single Read
Tbr MACSI device asserts AB
BR to indicate it wishes to
perform a transfer Host asserts AB
BG The MACSI de-
vice moves to Tpa within the next three clocks
Tpa MACSI device drives AB
A and AB
AD with the ad-
dress asserts AB
AS drives AB
RW and AB
SIZ 20
and negates AB
BR if another transaction is not required
Td MACSI device negates AB
AS asserts AB
DEN and
samples AB
ACK and AB
ERR Slave asserts AB
ACK
drives AB
ERR drives AB
AD (with data) when ready
The MACSI device samples a valid AB
ACK capturing the
read data Tw states may occur after Td
Tr
MACSI device negates AB
RW
AB
DEN
and
AB
SIZ 20
and releases AB
A and AB
AS Slave
deasserts AB
ACK and AB
ERR and releases AB
AD
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 Tpa within the next three clocks
Tpa MACSI device drives AB
A and AB
AD with the ad-
dress asserts AB
AS drives AB
RW and AB
SIZ 20
and negates AB
BR if another transaction is not required
Td MACSI device negates AB
AS asserts AB
DEN
drives AB
AD with the write data and starts sampling
AB
ACK and AB
ERR Slave captures AB
AD data as-
serts AB
ACK and drives AB
ERR Tw states may occur
after Td if the slave deasserts AB
ACK
Tr
MACSI device negates AB
RW
AB
DEN
and
AB
SIZ 20
and releases AB
A AB
AD and AB
AS
Slave deasserts AB
ACK and AB
ERR and stops driving
AB
AD with data
TLF11705 – 10
FIGURE 6-5 ABus Single Write Physical Addressing0 ws 1 ws
36



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