ISA WRITE
t10
AEN
t3
SA[x],
t2
t1
t4
t6
nIOW
SD[x]
t5
t7
DATA
FINTR
PINTR
IBF
t8
t9
FIGURE 14 - ISA WRITE TIMING
TABLE 82 - ISA WRITE TIMING
NAME
t1
t2
DESCRIPTION
SA[x], nCS and AEN valid to nIOW asserted
nIOW asserted to nIOW deasserted
MIN
10
80
TYP
MAX
UNITS
ns
ns
t3
nIOW asserted to SA[x], nCS invalid
10
ns
t4
SD[x] Valid to nIOW deasserted
45
ns
t5
SD[x] Hold from nIOW deasserted
0
ns
t6
t7
t8
t9
nIOW deasserted to nIOW asserted
25
10
ns
ns
ns
ns
nIOW deasserted to FINTR deasserted (Note 1)
nIOW deasserted to PINTER deasserted (Note 2)
IBF (internal signal) asserted from nIOW deasserted
nIOW deasserted to AEN invalid
55
260
40
t10
ns
Note 1: FINTR refers to the IRQ used by the floppy disk
Note 2: PINTR refers to the IRQ used by the parallel port
209
SMSC [ SMSC CORPORATION ]
