PARALLEL PORT
PD0- PD7
t6
nIOW
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 23 - PARALLEL PORT TIMING
TABLE 91 - PARALLEL PORT TIMING
NAME
DESCRIPTION
MIN
TYP
MAX
100
60
300
105
105
100
UNITS
ns
ns
ns
ns
t1
t2
t3
t4
t5
t6
PD0-7, nINIT, nSTROBE, nAUTOFD Delay from nIOW
PINTR Delay from nACK, nFAULT
PINTR Active Low in ECP and EPP Modes
PINTR Delay from nACK
nERROR Active to PINTR Active
PD0 - PD7 Delay from IOW Active
200
ns
ns
Note:
PINTR refers to the IRQ used by the parallel port.
220