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
PINTR Active Low in ECP and EPP
Modes
60
300
ns
ns
200
PINTR Delay from nACK
nERROR Active to PINTR Active
PD0-PD7 Delay from nIOW Active
t4
t5
t6
105
105
100
ns
ns
ns
PINTR is the interrupt assigned to the Parallel Port
FIGURE 14 - PARALLEL PORT TIMING
SMSC DS – FDC37N769
Page 126 of 137
Rev. 02-16-07
DATASHEET