STPCI2HEYCE STMicroelectronics, STPCI2HEYCE Datasheet - Page 85

• Manufacturer Part Number: STPCI2HEYCE
• Manufacturer: STMicroelectronics

Specifications of STPCI2HEYCE

• Lead Free Status / RoHS Status: Compliant

6.3.9. VGA INTERFACE
The STPC integrates a voltage reference and
video buffers. The amount of external devices is
then limited to the minimum as described in the
Figure
All the resistors and capacitors have to be as close
as possible to the STPC while the circuit protector
DALC112S1 must be close to the VGA connector.
The DDC[1:0] lines, not represented here, have
also to be protected when they are used on the
VGA connector.
Figure 6-15. Typical VGA implementation
6-15.
VREF_DAC
VDD_DAC
VSS_DAC
COL_SEL
HSYNC
VSYNC
COMP
RSET
DCLK
G
R
B
143
1%
10nF
75 1%
100nF
COL_SEL can be used when implementing the
Picture-In-Picture function outside the STPC, for
example when multiplexing an analog video
source. In that case, the CRTC of the STPC has to
be genlocked to this analog source.
DCLK is usually used by the TFT display which
has RGB inputs in order to synchronise the picture
at the level of the pixel.
When the VGA interface is not needed, the signals
R, G, B, HSYNC, VSYNC, COMP, RSET can be
left unconnected, VSS_DAC and VDD_DAC must
then be connected to GND.
100nF 47uF
DALC112S1
3.3V
AGND
AGND
2.5V
STPC® ATLAS
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