SMC Networks SMC91C95 Product Manual page 124

A0-15
(ISA)
AEN
nIOWR
t3
nIORD
t5
Z
D0-7
t3 Address, nSBHE, AEN Setup to Control Active
t5 nIORD Low to Valid Data
t7 Data Setup to nIOWR Rising
t8 Data Hold after nIOWR Rising
FIGURE 32 - 8-BIT MODE REGISTER CYCLES
A0-19
t3
nMEMRD
D0-15
t3 Address Setup to Control Active
t4 Address Hold after Control Inactive
t16 nMEMRD Low to nROM Low
t17 nMEMRD High to nROM High
BALE tied high
FIGURE 33 - EXTERNAL ROM READ ACCESS
VALID ADDRESS
VALID DATA OUT
Parameter
ADDRESS VALID
Z
Parameter
124
VALID ADDRESS
t3
Z
VALID DATA IN
min typ max
25
40
30
9
t4
min typ max
25
20
0 25
0 30
t7
t8
units
ns
ns
ns
ns
units
ns
ns
ns
ns