Parallel Port Timing
PD0- PD7
t6
nIOW
t1
nINIT, nSTROBE.
nAUTOFD, SLCTIN
PINTR (SPP)
nACK
t2
t3
t4
PINTR
(ECP or EPP
Enabled)
nFAULT (ECP)
nERROR
(ECP)
t5
t2
t3
PINTR
Parameter
min
typ
max
units
t1
nINIT, nSTROBE, nAUTOFD Delay from
nIOW Inactive
100
ns
t2
t3
PINTR Delay from nACK, nFAULT
60
300
ns
ns
PINTR Active Low in ECP and EPP
200
Modes
PINTR Delay from nACK
t4
t5
t6
105
105
100
ns
ns
ns
nERROR Active to PINTR Active
PD0-PD7 Delay from nIOW Active
PINTR is the interrupt assigned to the Parallel Port
FIGURE 18 - PARALLEL PORT TIMING
SMSC DS – FDC37N3869
Page 127
Rev. 10/25/2000