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91C94 Datasheet(PDF) 103 Page - SMSC Corporation

Part # 91C94
Description  ISA/PCMCIA SINGLE CHIP ETHERNET CONTROLLER WITH RAM
PDF  120 Pages
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Manufacturer  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
Logo SMSC - SMSC Corporation

91C94 Datasheet(HTML) 103 Page - SMSC Corporation

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103
FIGURE 28 – 8 BIT MODE REGISTER CYCLES
FIGURE 29 – EXTERNAL ROM READ ACCESS
A0-15
(IS A)
AEN
nIORD
D0-7
nIOWR
t3
t3
t5
Z
VALID DATA OUT
Z
VALID DATA IN
t7
t8
VALID ADDRE SS
t3
t5
t7
t8
Address, nSB HE , AEN Setup to Control Acti ve
nIORD Low to Valid Data
Data Setup to nIOWR Rising
Data Hold after nIOWR Rising
Parameter
m in
typ
max
uni ts
25
30
9
40
ns
ns
ns
ns
VALID ADDRE SS
A0-19
nMEMRD
ADDRESS VALID
D0-15
t3
t4
Z
t3
t4
t16
t17
Address Setup to Control Act ive
Address Hold after Control Inactive
nMEMRD Low to nROM Low
nMEM RD High to nROM High
Parameter
min
typ
max
units
25
20
0
0
25
30
ns
ns
ns
ns
BALE tied high



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