Parallel Port - Epson SCE8720C Series Hardware Manual

4.5 Parallel port

SCE8720C supports 1 parallel port complying with IEE1284.
This port can be used in ECP, EPP or SPP mode.
SCE8720C
LPTD7∼0
LPTINIT#
LPTSTROBE#
LPTBUSY
LPTPE
LPTACK#
LPTAFD#
LPTERROR#
LPTSLCT
LPTSLCTIN#
All the parallel port signals require pull-up resistance of 4.7kΩ or so.
Even when the parallel port is not in use, the LPTD[7:0],LPTINIT#,LPTSTROBE#,
PTAFD#,LPTSLCTIN# signals require pull-up resistance of 100kΩ or so.
The diode in the dotted rectangular is for preventing troubles from happening due to
current flowing from the printer signal to the 5V of the system when the power of the
system including SCE8720C is OFF and the power of the printer is ON. This is essential
for such system which mis-operates when +5V becomes 1 to 2V. Place it as necessary.
Rev.A
5V
4.7K×8
4.7K×9
+5V
Figure 4.4 Parallel interface connection
EPSON
CARD-PCI/GX Hardware Manual
Printer port
D7∼0
INIT#
STROBE#
BUSY
PE
ACK#
AFD#
ERROR#
SLCT
SLCTIN#
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