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VDP3132Y 参数 Datasheet PDF下载

VDP3132Y图片预览
型号: VDP3132Y
PDF下载: 下载PDF文件 查看货源
内容描述: 视频处理器家族 [Video Processor Family]
分类和应用:
文件页数/大小: 76 页 / 1707 K
品牌: MICRONAS [ MICRONAS ]
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VDP 313xY  
ADVANCE INFORMATION  
2.11.5.Fast Blank Monitor  
2.11.7.IO Port Expander  
The presence of external analog RGB sources can be  
detected by means of a fast blank monitor. The status  
of the selected fast blank input can be monitored via  
an I2C bus register. There is a 2 bit information, giving  
static and dynamic indication of a fast blank signal.  
The static bit is directly reading the fast blank input  
line, whereas the dynamic bit is reading the status of a  
flip-flop triggered by the negative edge of the fast blank  
signal.  
The VDP 313xY provides a general purpose IO port to  
control and monitor up to seven external signals. The  
port direction is programmable for each bit individually.  
Via I2C bus register it is possible to write or read each  
port pin. Because of the relatively low I2C bus speed,  
only slow or static signals can be handled.  
With this monitor logic it is possible to detect if there is  
an external RGB source active and if it is a full screen  
insertion or only a box. The monitor logic is connected  
directly to the FBLIN1 or FBLIN2 pin. Selection is done  
via I2C bus register.  
2.11.6. Half Contrast Control  
Insertion of transparent text pages or OSD onto the  
video picture is often difficult to read, especially if the  
video contrast is high. The VDP 313xY allows contrast  
reduction of the video background by means of a half  
contrast input (HCS pin). This input can be supplied  
with a fast switching signal (similar to the fast blank  
input), typically defining a rectangular box in which the  
video picture is displayed with reduced contrast. The  
analog RGB inputs are still displayed with full contrast.  
FBFOH1 FBFOL1  
FBPOL  
#
FBPRIO  
HCSPOL  
HCS  
FBLIN1  
#
HCS intern  
FB  
int  
Fast  
Blank  
Monitor  
Fast  
Blank  
Selection  
HCSEN HCSFOH  
Fig. 222: Half Contrast Switch Logic  
FBLIN2  
#
FBFOH2 FBFOL2 FBMON  
Fig. 221: Fast Blank Selection Logic  
24  
Micronas