EPP
SIGNAL
EPP NAME
TYPE
EPP DESCRIPTION
ADDRSTB nAddress
Strobe
O
This signal is active low. It is used to denote address read or
write operation.
PE
Paper End
I
I
Same as SPP mode.
Same as SPP mode.
SLCT
Printer Selected
Status
nERR
PDIR
Error
I
Same as SPP mode.
Parallel Port
Direction
O
This output shows the direction of the data transfer on the
parallel port bus. A low means an output/write condition and a
high means an input/read condition. This signal is normally a
low (output/write) unless PCD of the control register is set or if
an EPP read cycle is in progress.
Note 1: SPP and EPP can use 1 common register.
Note 2: nWrite is the only EPP output that can be over-ridden by SPP control port during an EPP cycle. For correct
EPP read cycles, PCD is required to be a low.
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SMSC [ SMSC CORPORATION ]
