SMC Networks SMC91C95 - Manual (Page 119)

119
FIGURE 27 - ISA CONSECUTIVE READ CYCLES
BALE Tied High
VALID ADDRESS VALID ADDRESS
VALID DATA
OUT
VALID DATA
OUT
t15 t4
t3 t20
t5 t6
Z Z
A0-15
AEN, nSBHE
nIOCS16
nIORD
D0-15
t3
t4
t5
t6
t15
t20
Address, nSBHE, AEN Setup to Control Active
Address, nSBHE, AEN Hold after Control
Inactive
nIORD Low to Valid Data
nIORD High to Data Floating
A4-A15, AEN Low, BALE High to nIOCS16
Low
Cycle time*
Parameter min typ max units
25
20
185
40
30
25
ns
ns
ns
ns
ns
ns
IOCHRDY not used - t20 has to be met
*Note: The cycle time is defined only for consecutive accesses to the Data Register. These values assume
that IOCHRDY is not used.