Datamax-O'Neil I-Class GPIO Multi-Expansion Option User Manual
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5
GPIO Start of Print Control
External Start of Print / Backup Label control can be made in
one of the following ways:
By direct connections to Pins 8 & 7 using TTL-level inputs;
or,
By using an interface circuit similar to the one shown right.
For additional interfacing requirements, see the table below.
GPIO Specifications*
V
in
max
5.5 VDC maximum input into any pin
V
IH
3.8 VDC minimum (high level input voltage)
V
IL
1.65 VDC maximum (low level input voltage)
I
OH
-8 mA typical, - 25 mA maximum (high level output current)
I
OL
8 mA typical 25 mA maximum (low level output current)
V
OH
I
OH
=
-8
mA, minimum 3.8 VDC
V
OL
I
OL
=
8
mA, maximum .44 VDC
*See the SN74AHC244 data sheet for more information.
ILPC Fonts – For extended font capabilities, the following sets are available:
CG-Times (western European) Scalable font
Kanji Gothic B Scalable font
Simplified Chinese GB Scalable font
Korean Hangul Scalable font
These ILPC font sets arrive pre-loaded. To use them, refer to the Programmer’s Manual, which can
be found on the Datamax-O’Neil Accessories CD or on our web site at www.datamax-oneil.com.
Secondary Serial Port (MCL users only, kit number78-2669-01):
Included on this multipurpose interface card is a secondary RS-232 serial port, one specifically
designed for use with specially configured MCL application programs and firmware. As mentioned
earlier in this document, incorrectly repositioning the jumper blocks on this card could cause damage to
your Datamax-O’Neil printer; therefore, it is important to note that only knowledgeable technicians, after
first consulting with Datamax-O’Neil technical support, must enable this feature. Under the described
normal operation of this card, with its GPIO / applicator interface or font expansion features, there
should be no cause for concern.