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參數資料
| 型號： | ADV7344 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Multiformat Video Encoder Six 14-Bit Noise Shaped Video DACs |
| 中文描述： | 多格式視頻編碼器6 14位噪聲整形視頻DAC |
| 文件頁數： | 77/88頁 |
| 文件大小： | 1078K |
| 代理商： | ADV7344 |
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ADV7344
Rev. 0 | Page 77 of 88
622
623
624
625
21
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23
DISPLAY
VERTICAL BLANK
ODD FIELD
EVEN FIELD
FIELD
DISPLAY
309
310
311
312
313
314
315
316
317
318
319
334
335
336
DISPLAY
VERTICAL BLANK
ODD FIELD
EVEN FIELD
DISPLAY
320
FIELD
5
7
6
4
3
2
1
HSYNC
HSYNC
0
Figure 105. SD Slave Mode 1, PAL
Mode 1—Master Option (Subaddress 0x8A = X X X X X 0 1 1)
In this mode, the ADV7344 can generate horizontal sync and odd/even field signals. When HSYNC is low, a transition of the field input
indicates a new frame, that is, vertical retrace. The ADV7344 automatically blanks all normally blank lines as per CCIR-624. Pixel data is
latched on the rising clock edge following the timing signal transitions. HSYNC and FIELD are output on the S_HSYNC and S_VSYNC
pins, respectively.
FIELD
PIXEL
DATA
Cb
Y
Cr
Y
HSYNC
PAL = 132 × CLOCK/2
NTSC = 122 × CLOCK/2
0
Figure 106. SD Timing Mode 1, Odd/Even Field Transitions (Master/Slave)
Mode 2— Slave Option (Subaddress 0x8A = X X X X X 1 0 0)
In this mode, the ADV7344 accepts horizontal and vertical sync signals. A coincident low transition of both HSYNC and VSYNC inputs
indicates the start of an odd field. A VSYNC low transition when HSYNC is high indicates the start of an even field. The ADV7344
automatically blanks all normally blank lines as per CCIR-624. HSYNC and VSYNC are input on the S_HSYNC and S_VSYNC pins,
respectively.
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