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LAN9250 데이터시트(PDF) 116 Page - Microchip Technology

부품명 LAN9250
상세설명  Integrated Ethernet PHY with HP Auto-MDIX
PDF  421 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN9250 데이터시트(HTML) 116 Page - Microchip Technology

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LAN9250
DS00001913A-page 116
 2015 Microchip Technology Inc.
Note 14: RD_WR and ENB signaling.
Note 15: RD and WR signaling.
Note:
Timing values are with respect to an equivalent test load of 25 pF.
TABLE 9-4:
INDEXED ADDRESSING READ CYCLE TIMING VALUES
Symbol
Description
Min
Typ
Max
Units
tcsrd
CS Setup to RD or ENB Active
0
ns
trdcs
CS Hold from RD or ENB Inactive
0
ns
tas
Address, FIFOSEL Setup to RD or ENB Active
0
ns
tah
Address, FIFOSEL Hold from to RD or ENB Inactive
0
ns
trdwrs
RD_WR Setup to ENB Active
Note 14
5ns
trdwrh
RD_WR Hold from ENB Inactive
Note 14
5ns
trdon
RD or ENB to Data Buffer Turn On
0
ns
trddv
RD or ENB Active to Data Valid
30
ns
trddh
Data Output Hold Time from RD or ENB Inactive
0
ns
trddz
Data Buffer Turn Off Time from RD or ENB Inactive
9
ns
tcson
CS to Data Buffer Turn On
0
ns
tcsdv
CS Active to Data Valid
30
ns
tcsdh
Data Output Hold Time from CS Inactive
0
ns
tcsdz
Data Buffer Turn Off Time from CS Inactive
9
ns
tfdv
FIFOSEL to Data Valid
30
ns
tadv
Address to Data Valid
30
ns
trd
RD or ENB Active Time
32
ns
trdcyc
RD or ENB Cycle Time
45
ns
trdrd
RD or ENB De-assertion Time before Next RD or ENB
13
ns
trdwr
RD De-assertion Time before Next WR
Note 15
13
ns



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