Siemens PC 670 Manuel de service Page 139

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Hardware Information
6-23
SIMATIC Panel PC 670 Computing Unit Equipment Manual
Edition 12/01
Display port (LVDS), X400
TFT displays with an LVDS port can be connected to this port. 18-bit displays
having a resolution up to 1024x768 pixels can be connected. The permissible
display clock rate is 20 MHz to 66 MHz. The display is selected automatically
according to the code of the Display Select inputs. The display supply voltages
(3,3 V and 5 V) are connected as a function of the requirements for the connected
displays via the graphics controller. The maximum cable length is 50 cm at a
transfer rate of 455 MHz. Specific cable properties have to be taken into account
for differential cable pairs in accordance with the LVDS specification.
Pin No. Signal Meaning
1 P5V_D_fused +5V (fused) Display VCC
2 P5V_D_fused +5V (fused) Display VCC
3 RXIN0 LVDS input signal bit 0 ()
4 RXIN0+ LVDS input signal bit 0 (+)
5 P3V3_D_fused +3.3V (fused) display VCC
6 P3V3_D_fused +3.3V (fused) display VCC
7 RXIN1 LVDS input signal bit 1 ()
8 RXIN1+ LVDS input signal bit 1 (+)
9 GND
10 GND
11 RXIN2 LVDS input signal bit 2 ()
12 RXIN2+ LVDS input signal bit 2 (+)
13 GND
14 GND
15 RXCLKIN LVDS clock signal ()
16 RXCLKIN+ LVDS clock signal (+)
17 GND
18 GND
19 Reserved
20 Reserved
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