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Allocation of the Display to Display Select Pins
The automatic configuration of one of 15 possible displays is effected via the
Display Select Inputs. The Display Select inputs are fitted with Pull-Up resistors,
i.e., if these inputs are not connected, they have a high level. In order to generate
a low level, the input must be connected to GND.
Pin No.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
SIMATIC Box PC 840 Manual
A5E00085984-04
LCD_SEL3 LCD_SEL2 LCD_SEL1 LCD_SEL0 Display type
low
low
low
low
low
low
low
low
low
high
low
high
low
high
low
high
high
low
high
low
high
low
high
low
high
high
high
high
high
high
high
high
low
low
reserved
low
high
reserved
high
low
reserved
high
high
reserved
low
low
640 x 480 (VGA), TFT,
18 bits
low
high
reserved
high
low
1024 x 768 (XGA), TFT,
18 bits
high
high
800 x 600 (SVGA), TFT,
18 bits
low
low
reserved
low
high
reserved
high
low
reserved
high
high
reserved
low
low
reserved
low
high
reserved
high
low
reserved
high
high
No display / DDC selec-
ted display
Hardware Information
7-19

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