參數(shù)資料
型號: STPCC0166BTI3
廠商: STMICROELECTRONICS
元件分類: 外設(shè)及接口
英文描述: MULTIFUNCTION PERIPHERAL, PBGA388
封裝: PLASTIC, BGA-388
文件頁數(shù): 57/71頁
文件大?。?/td> 1238K
代理商: STPCC0166BTI3
Obsolete
Product(s)
- Obsolete
Product(s)
DESIGN GUIDELINES
60/71
Issue 2.4 - November 8, 2001
6.2.4 VGA interface
The STPC integrates a VGA DACs and video buff-
ers. The amount of external devices is then limited
to the minimum as described in the Figure 6-6.
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.
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 displays which
have RGB inputs in order to synchronise the pic-
ture 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[2:1] and VDD_DAC
must then be connected to GND.
6.3 Place and route recommendations
Figure 6-6. Typical VGA implementation
536
VDD_DAC
COMP
VREF_DAC
RSET
VSS_DAC1
3.3V
10nF
100nF 47uF
AGND
COL_SEL
DCLK
HSYNC
VSYNC
R
G
B
75 1%
DALC112S1
AGND
3.3V
VSS_DAC2
1%
100nF
1K
16VLM385BZ
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