參數(shù)資料
型號(hào): TVP3010-135
廠商: Texas Instruments, Inc.
英文描述: Hardware Cursor, GAMMA Correction VIP(135MHz,高/寬光標(biāo),伽馬校正,視頻接口調(diào)色板)
中文描述: 硬件光標(biāo),伽瑪校正貴賓(135MHz,高/寬光標(biāo),伽馬校正,視頻接口調(diào)色板)
文件頁數(shù): 45/100頁
文件大小: 571K
代理商: TVP3010-135
2–31
If VGA is disabled, OVS is sampled on the falling edge of VCLK and then resampled on the rising edge of
RCLK before being passed to the RCLK and dot clock pipeline delay. If VGA is enabled, then OVS is
sampled on the rising edge of CLK0 and passed to dot clock pipeline delay. In this way, the video timing
relationship is maintained since the same method and pipeline delay are applied to the SYSBL and VGABL
signals.
Figure 2–12 demonstrates the use of OVS to produce a custom overscan screen border.
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Overscan Border
OVS
Blank
Figure 2–12. Overscan
2.8
The TVP3010 palette supports a user-programmable horizontal 2-, 4-, 8-, 16-, or 32-
x
zooming function.
Zooming can be controlled through the auxiliary-control register on the indirect-register map as shown by
the following table. Note that the RCLK/SCLK divide ratio also has to be modified in the output-clock
selection register.
Horizontal Zooming
ACR7
ACR6
ACR5
HORIZONTAL ZOOM
0
0
0
1x
0
0
1
2x
0
1
0
4x
0
1
1
8x
1
0
0
16x
1
0
1
32x
When one of the horizontal zooms (besides 1
×
) is chosen, the internal pixel data multiplexer is configured
such that it replicates the pixel data on successive dot clocks by the number of times specified by ACR(5–7).
Also, modify the RCLK/SCLK divide ratio in the output clock selection register to facilitate the pixel
replication. The new RCLK divide ratio should be chosen as the old RCLK divide ratio multiplied by the zoom
factor. It is recommended that the zoom only be changed during vertical retrace.
The horizontal zoom function applies only to the pixel port P(0–31). If the VGA port is enabled
(MCR2 bit 7 = 1), the horizontal zoom function is disabled.
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