參數(shù)資料
型號(hào)： GM5060-H
廠商： Electronic Theatre Controls, Inc.
英文描述： GRAPHICS PROCESSING IC PROVIDING HIGH QUALITY IMAGES FOR LCD MONITORS
中文描述： 圖形處理芯片提供高品質(zhì)的圖像液晶顯示器
文件頁(yè)數(shù)： 27/85頁(yè)
文件大?。?/td> 1375K
代理商： GM5060-H
Genesis Microchip
gm5060 / gm5060-H Data Sheet
February 2002
C5060-DAT-01G
19
4
4
.
.
3
3
A
A
n
n
a
a
l
l
o
o
g
g
t
t
o
o
D
D
i
i
g
g
i
i
t
t
a
a
l
l
C
C
o
o
n
n
v
v
e
e
r
r
t
t
e
e
r
r
The gm5060 chip has three ADC’s (analog-to-digital converters), one for each color (red, green,
and blue).
Image
Capture
YUV
RealColor
Controls
RGB
Color
Controls
Frame Rate
Conversion
Zoom/
Shrink
Scaling
Triple
ADC
DVI
Rx
ITU656
Decoder
Gamma
Correction
LUT
HDCP
Image
Measurement
Display Timing
& Control
OSD
Frame
Store
Interface
Micro-
processor
(MCU)
Host
Interface
SDRAM
Interface
Analog
RGB
Digital
DVI
Digital YUV
Video
(8-bits)
Serial
Interface
Panel
Interface
.
Clock
Recovery
Input
Color
LUT
(24/48-bits)
Display
Clock
Generation
Figure 10. ADC Block
4.3.1 Pin Connection
The RGB signals are connected to the gm5060 as described below:
Table 10. Pin Connection for RGB Input with HSYNC/VSYNC
Pin Name
ADC Signal Name
Red+
Red-
Green+
Green-
Blue+
Blue-
HSYNC/CS
VSYNC
Red
Terminate as illustrated in Figure 11
Green. When using Sync-On-Green, this signal also carries the sync pulse
Terminate as illustrated in Figure 11
Blue
Terminate as illustrated in Figure 11
Horizontal Sync (Terminate as illustrated in Figure 11) or Composite Sync
Vertical Sync (Terminate as with HSYNC illustrated in Figure 11)
The gm5060 HSync and VSync input pins contain Schmitt trigger with typical hysteresis of 350
mV. It is possible to encounter some combinations of video sources, cable, and PCB layout that
will exhibit ringing or glitching at the sync signal edges. In severe cases, the glitching may
exceed the internal hysteresis provided and cause “false” triggering within the chip. Using
external Schmitt triggers can help eliminate this problem. Figure 11 shows the use of external
Schmitt triggers on the Hsync and VSync input pins. A device such as the 74AC14 provides
typical hysteresis of 1 volt. Using two Schmitt triggers in series provides a buffered sync signal
with very little distortion.
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