Parallel Port
PD0- PD7
nIOW
t6
t1
nINIT, nSTROBE.
nAUTOFD, SLCTIN
nACK
t2
nPINTR
(SPP)
t4
t3
PINTR
(ECP or EPP Enabled)
nFAULT (ECP)
nERROR
(ECP)
t5
t2
t3
PINTR
FIGURE 22 - PARALLEL PORT TIMING
TABLE 101 - PARALLEL PORT TIMING
NAME
DESCRIPTION
MIN
TYP
MAX
100
60
UNITS
ns
t1
t2
t3
t4
t5
t6
PD0-7, nINIT, nSTROBE, nAUTOFD Delay from nIOW
PINTR Delay from nACK, nFAULT
ns
PINTR Active Low in ECP and EPP Modes
PINTR Delay from nACK
200
300
105
105
100
ns
ns
nERROR Active to PINTR Active
ns
PD0 - PD7 Delay from IOW Active
ns
Note
PINTR refers to the IRQ used by the parallel port.
239