DP83901AV datasheet(54/62 Pages) NSC

부품명	DP83901AV

상세설명	Serial Network Interface Controller

PDF	62 Pages

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제조업체	NSC [National Semiconductor (TI)]

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150 Switching Characteristics AC Specs DP83901A Note All Timing is Preliminary (Continued)

DMA Memory Read

TLF10469 – 38

Symbol

Parameter

Min

Max

Units

bcrl

Bus Clock to Read Strobe Low

bcrh

Bus Clock to Read Strobe High

Data Setup to Read Strobe High

Data Hold from Read Strobe High

drw

DMA Read Strobe Width Out

2 bcyc b 15

raz

Memory Read High to Address TRI-STATE

bch a 40

(Notes 1 2)

asds

Address Strobe to Data Strobe

bcl a 10

dsada

Data Strobe to Address Active

bcyc b 10

avrh

Address Valid to Read Strobe High

3 bcyc b 18

Note 1

During a burst A8–A15 are not TRI-STATE if byte wide transfers are selected On the last transfer A8–A15 are TRI-STATE as shown above

Note 2

These limits include the RC delay inherent in our test method These signals typically turn off within bch a 15 ns enabling other devices to drive these

lines with no contention

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