DESCRIPTION OF PIN FUNCTIONS
BUFFER
QFP/
TQFP
PIN NO.
TYPE
NAME
SYMBOL
DESCRIPTION
77
nStrobe Output
nSTROBE
OD24
An active low pulse on this output is used to
strobe the printer data into the printer. The
nSTROBE output is the complement of bit 0
of the Printer Control Register.
Refer to Parallel Port description for use of
this pin in ECP and EPP mode.
0P24
61
Busy
BUSY
I
This is a status output from the printer, a
high indicating that the printer is not ready
to receive new data. Bit 7 of the Printer
Status Register is the complement of the
BUSY input.
Refer to Parallel Port
description for use of this pin in ECP and
EPP mode.
62
60
nAcknowledge
Paper End
nACK
I
I
A low active output from the printer
indicating that it has received the data and
is ready to accept new data. Bit 6 of the
Printer Status Register reads the nACK
input. Refer to Parallel Port description for
use of this pin in ECP and EPP mode.
PE
Another status output from the printer, a
high indicating that the printer is out of
paper. Bit 5 of the Printer Status Register
reads the PE input. Refer to Parallel Port
description for use of this pin in ECP and
EPP mode.
59
75
Printer Selected SLCT
Status
I
I
This high active output from the printer
indicates that it has power on. Bit 4 of the
Printer Status Register reads the SLCT
input. Refer to Parallel Port description for
use of this pin in ECP and EPP mode.
nError
nERROR
A low on this input from the printer indicates
that there is a error condition at the printer.
Bit 3 of the Printer Status register reads the
nERR input.
Refer to Parallel Port
description for use of this pin in ECP and
EPP mode.
12
SMSC [ SMSC CORPORATION ]
