参数资料
型号: SN65LVDS305ZQE
厂商: Texas Instruments, Inc.
英文描述: PROGRAMMABLE 27-BIT DISPLAY SERIAL INTERFACE TRANSMITTER
中文描述: 可编程27位显示器串行接口变送器
文件页数: 22/25页
文件大小: 586K
代理商: SN65LVDS305ZQE
www.ti.com
Calculation Example: HVGA Display
Visible area = 480 column
Visible area
Entire display
Vsync = 5
VBP = 3
Visible area
= 320 lines
VFP = 10
Hsync = 5
HFP = 20
H
SN65LVDS305
SLLS744–AUGUST 2006
This example calculation shows a typical half-VGA display with these parameters:
Display resolution:
Frame refresh rate:
320
×
480
58.4 Hz
Vertical visible pixel:
Vertical front porch:
Vertical sync:
Vertical back porch:
480 lines
20 lines
5 lines
3 lines
Horizontal visible pixel:
Horizontal front porch:
Horizontal sync:
Horizontal back porch:
320 columns
10 columns
5 columns
3 columns
Figure 23. HVGA Display Parameters
Calculation of the total number of pixels and blanking overhead:
Visible area pixel count:
Total frame pixel count:
Blanking overhead:
480
×
320 = 153,600 pixels
(480 + 20 + 5 + 3)
×
(320 + 10 + 5 + 3) = 173,304 pixels
(173,304 – 153,600)
÷
153,600 = 12.8%
The application requires following serial-link parameters:
Pixel clk frequency:
Serial data rate:
173,304
×
58.4 Hz = 10.1 MHz
10.4 MHz
×
30 bits = 304 Mbps
22
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