EAEDIP128B-6LW Datasheet, PDF (8/29 Pages) List of Unclassifed Manufacturers – OPERATING UNIT 128x64 with touch panel

EA eDIP128-6
Page 8
ELECTRONIC ASSEMBLY reserves
the right to change specifications
without prior notice. Printing and
typographical errors reserved.
IN- AND OUTPUTS
The eDIP128-6 has 8 digital in- or outputs (CMOS level, grounded). They can be redefined freely.
Inputs
As status on delivery, all ports are defined as inputs. Each input provides an internal
20..50 kΩ pull-up resistor, so it is possible to connect a key or switch directly between
input and GND. The inputs can be queried and evaluated directly via the serial
interface („ESC Y R“).
In addition to that every port change may start an individual port - or bit- macro (see p.
24). The command "ESC Y A 1" activates automatic port query. Every alteration of inputs firstly calls
bit macros and afterwards port macros. If there is no definied macro, the new status is transfered into
the send buffer (refer to p. 18).
Note: The logic circuitry is designed for slow operations; in other words, more than 3 changes per
second cannot be easily executed.
Outputs
The command "ESC Y M number" redefines one or several inputs as outputs. In this case the more
significant inputs are used as outputs.
'ESC Y M 3' switches IN8, IN7 and IN6 as outputs OUT1, OUT2 and OUT3
for example.
Each line can be controlled individually using the „ESC Y W“ command. A
maximum current of 10mA can be switched per line. This give the opportunity
to drive a low power LED in direct way. To source higher current please use
an external transistor.
EXTENDED OUTPUTS
It is possible to connect 1 to 32 chips like 74HC4094 to the eDIP (OUT1...OUT3), this is why it is
attainable to have 8 to 256 additional outputs. The command "ESC Y E n1 n2 n3" (see p. 16) provides
a comfortable way to control the outputs.